Dayangchem's R&D center can offer custom synthesis according to the contract research and development services for the fine chemicals, pharmaceutical, biotechnique and some of the other chemicals. DayangChem can provide different quantities
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4-ethyl-2-methyl-1,3-dioxolane
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With water under 76.0051 - 760.051 Torr; Reflux; | 98.5% |
1,2-butylene carbonate
A
methanol
B
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With (bis[(2-diisopropylphosphino)ethyl]amine)Mn(CO)2Br; hydrogen; sodium t-butanolate In tetrahydrofuran at 120℃; under 22502.3 Torr; for 26h; Schlenk technique; Glovebox; Autoclave; | A 74% B 97% |
With carbonylhydrido(tetrahydroborato)[bis(2-diphenylphosphinoethyl)-amino]ruthenium(II); potassium carbonate In isopropyl alcohol at 140℃; Glovebox; | A 94 %Chromat. B 94% |
With [bis({2‐[bis(propan‐2‐yl)phosphanyl]ethyl})amine](bromo)(carbonyl)(hydride)iron(II); potassium tert-butylate; isopropyl alcohol In tetrahydrofuran at 140℃; for 18h; Catalytic behavior; Mechanism; Concentration; Solvent; Temperature; Reagent/catalyst; Time; Inert atmosphere; Schlenk technique; Green chemistry; | A 83 %Chromat. B 72% |
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With silica gel; triethylamine In diethyl ether; Petroleum ether Substitution; Detrifluoroacetylation; | 96% |
Conditions | Yield |
---|---|
With water In N,N-dimethyl-formamide at 110℃; for 20h; | 92% |
With water at 90℃; under 11251.1 Torr; | 92.8% |
With water at 90℃; under 11251.1 Torr; | 92.7% |
1,2-butylene carbonate
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With potassium tert-butylate; hydrogen; C16H18BrCoINO2 In dibutyl ether at 160℃; under 45004.5 Torr; for 20h; Sealed tube; Autoclave; | 92% |
With ammonium bromide; ethylenediamine at 80℃; for 5h; Microwave irradiation; | > 95 %Spectr. |
2-Hydroxybutanoic acid
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With hydrogen In water at 119.84℃; under 7500.75 - 60006 Torr; for 2h; Catalytic behavior; Reagent/catalyst; Autoclave; Sealed tube; | 92% |
Conditions | Yield |
---|---|
Stage #1: 1-butylene With Oxone; potassium chloride In water; acetone at 30℃; for 12h; Large scale; Stage #2: With water; potassium hydroxide at 25 - 40℃; for 4h; pH=12; Large scale; | 88% |
With dihydrogen peroxide; tungsten(VI) oxide; acetic acid at 70℃; | |
With formic acid; dihydrogen peroxide at -17℃; beim anschliessenden Erwaermen mit wss. Natronlauge; |
ethyloxirane
carbon dioxide
aniline
A
5-ethyl-3-phenyl-1,3-oxazolidine-2-one
B
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With C24H25N4O3(1+)*I(1-); 1,8-diazabicyclo[5.4.0]undec-7-ene at 110℃; under 3750.38 Torr; for 25h; Autoclave; | A 80% B n/a |
Conditions | Yield |
---|---|
With hydrogen In 1,4-dioxane at 159.84℃; under 60006 Torr; for 24h; Autoclave; | A 12% B 79% |
With hydrogen In 1,4-dioxane at 139.84℃; under 60006 Torr; for 4h; Autoclave; |
(2R)-1-(benzyloxy)-2-butanol
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With palladium 10% on activated carbon; hydrogen In ethanol | 79% |
(2S)-but-3-ene-1,2-diol
1,2-dihydroxybutane
Conditions | Yield |
---|---|
In palladium-carbon; ethanol | 68% |
<(2-tetrahydropyranoyloxy)methyl>oxirane
methylmagnesium bromide
1,2-dihydroxybutane
Conditions | Yield |
---|---|
Stage #1: <(2-tetrahydropyranoyloxy)methyl>oxirane; methylmagnesium bromide With copper(I) bromide In tetrahydrofuran at -10℃; for 1h; Inert atmosphere; Stage #2: With toluene-4-sulfonic acid In methanol at 20℃; | 64% |
glycerol
A
propylene glycol
B
Butane-1,4-diol
C
2.3-butanediol
D
1,2-dihydroxybutane
E
pentane-1,3-diol
Conditions | Yield |
---|---|
With sodium hydroxide; hydrogen at 212℃; under 51716.2 Torr; Product distribution / selectivity; | A 60% B n/a C n/a D n/a E n/a |
carbon dioxide
carbon monoxide
A
methanol
B
propan-1-ol
C
propylene glycol
D
1,4-Pentanediol
E
1 ,5-pentanediol
F
Butane-1,4-diol
G
diethyl ether
H
methane
I
ethanol
J
(+/-)-2-pentanol
K
1.3-butanediol
L
1,2-pentanediol
M
ethane
N
propane
O
Dimethyl ether
P
ethyl methyl ether
Q
2-methyl-propan-1-ol
R
2-pentanol
S
pentan-1-ol
T
1,3-pentanediol
U
acetic acid methyl ester
V
isopropyl alcohol
W
iso-butanol
X
tert-butyl alcohol
Y
butan-1-ol
Z
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With hydrogen; Cu/Co/Al at 260 - 320℃; under 45004.5 - 75007.5 Torr; Conversion of starting material; | A 57.5% B n/a C n/a D n/a E n/a F n/a G n/a H n/a I 28.5% J n/a K n/a L n/a M n/a N n/a O n/a P n/a Q n/a R n/a S n/a T n/a U n/a V n/a W n/a X n/a Y n/a Z n/a |
With hydrogen; Cu/ZnO/Al2O3 at 285 - 300℃; under 45004.5 - 67506.8 Torr; Conversion of starting material; | A 57.5% B n/a C n/a D n/a E n/a F n/a G n/a H n/a I 28.5% J n/a K n/a L n/a M n/a N n/a O n/a P n/a Q n/a R n/a S n/a T n/a U n/a V n/a W n/a X n/a Y n/a Z n/a |
carbon dioxide
carbon monoxide
A
methanol
B
propan-1-ol
C
propylene glycol
D
1,4-Pentanediol
E
1 ,5-pentanediol
F
Butane-1,4-diol
G
diethyl ether
H
ethanol
I
(+/-)-2-pentanol
J
1.3-butanediol
K
1,2-pentanediol
L
Dimethyl ether
M
ethyl methyl ether
N
2-methyl-propan-1-ol
O
2-pentanol
P
pentan-1-ol
Q
1,3-pentanediol
R
acetic acid methyl ester
S
isopropyl alcohol
T
iso-butanol
U
tert-butyl alcohol
V
butan-1-ol
W
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With hydrogen; Zn/Cr/K at 350 - 420℃; under 75007.5 - 135014 Torr; Conversion of starting material; | A 57.5% B n/a C n/a D n/a E n/a F n/a G n/a H 28.5% I n/a J n/a K n/a L n/a M n/a N n/a O n/a P n/a Q n/a R n/a S n/a T n/a U n/a V n/a W n/a |
glycerol
A
propylene glycol
B
ethylene glycol
C
2.3-butanediol
D
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With sodium hydroxide; hydrogen; HC-1 catalyst at 193 - 216℃; under 82745.9 Torr; Product distribution / selectivity; | A 56% B 4.37% C n/a D n/a |
A
propylene glycol
B
D-sorbitol
C
ethylene glycol
D
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With phosphotungstic acid; ruthenium-carbon composite; hydrogen In water at 250℃; under 45004.5 Torr; for 0.833333h; Autoclave; | A 5.5% B 12.4% C 53.1% D 6.2% |
1,2-butanediol diacetate
A
1-hydroxy-2-acetoxybutane
B
1,2-dihydroxybutane
Conditions | Yield |
---|---|
1,3-disubstituted tetraalkyldistannoxane (X = Y = Cl) In methanol; chloroform for 120h; Ambient temperature; | A 53% B 22% |
glycerol
A
propylene glycol
B
2.3-butanediol
C
1,2-dihydroxybutane
D
pentane-1,3-diol
Conditions | Yield |
---|---|
With sodium hydroxide; hydrogen at 209 - 213℃; under 51716.2 - 82745.9 Torr; Product distribution / selectivity; | A 51% B n/a C n/a D n/a |
1-butylene
A
(+/-)-2-hydroxybutanal
B
propionaldehyde
C
1-Hydroxy-2-butanone
D
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With air; dihydrogen peroxide for 0.5h; Product distribution; Kinetics; Further Variations:; reaction time; Oxidation; UV-irradiation; | A 7% B 50.6% C 24.2% D 18.2% |
Conditions | Yield |
---|---|
With Rh/C; hydrogen; ortho-tungstic acid; copper(II) sulfate In water at 245℃; under 45004.5 Torr; for 0.5h; Autoclave; | A 7.4% B 50% C 6.7% |
With phosphotungstic acid; platinum on activated charcoal; hydrogen In water at 250℃; under 45004.5 Torr; for 0.833333h; Autoclave; | A 12.8% B 23.2% C 6% |
With hydrogen In water at 219.84℃; under 31503.2 - 48754.9 Torr; for 8h; Autoclave; |
glycerol
A
methanol
B
LACTIC ACID
C
propylene glycol
D
ethanol
E
ethylene glycol
F
2.3-butanediol
G
1,2-dihydroxybutane
H
pentane-1,3-diol
Conditions | Yield |
---|---|
With sodium hydroxide; hydrogen; solid catalyst similar to the “G” catalyst disclosed in U.S. Pat. No. 6,479,713 or the “HC-1” catalyst available from Sud Chemie (Louisville, Ky.) In water at 154 - 229℃; under 62059.4 - 82745.9 Torr; Product distribution / selectivity; | A 0.6% B 0.7% C 47.3% D 0.1% E 2.1% F n/a G n/a H n/a |
D-sorbitol
A
hexane-1,2,6-triol
B
1,4,5-hexanetriol
C
1,2,5,6-hexanetetrol
D
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With propylene glycol; hydrogen; copper In water at 210℃; under 93089.1 Torr; Concentration; | A 5.51% B 26.54% C 46.12% D 10.26% |
glycerol
A
propylene glycol
B
2.3-butanediol
C
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With sodium hydroxide; hydrogen at 202℃; under 82745.9 Torr; Product distribution / selectivity; | A 43% B n/a C n/a |
With sodium hydroxide; hydrogen; solid catalyst similar to the "G" catalyst disclosed in US 6,479,713 or the "HC-1" catalyst available from Sd Chemie (Louisville, KY) at 154 - 229℃; under 62059.4 - 82745.9 Torr; Product distribution / selectivity; | A 33.2% B n/a C n/a |
With sodium hydroxide; hydrogen at 196℃; under 82745.9 Torr; Product distribution / selectivity; | A 27% B n/a C n/a |
With sodium hydroxide; hydrogen; solid catalyst similar to the “G” catalyst disclosed in U.S. Pat. No. 6,479,713 or the “HC-1” catalyst available from Sud Chemie (Louisville, Ky.) In water at 150 - 210℃; under 51716.2 Torr; Product distribution / selectivity; | A 10% B n/a C n/a |
With sodium hydroxide; hydrogen; Süd Chemie HC-1 catalyst In water at 159 - 212℃; under 96435 Torr; Product distribution / selectivity; |
A
propylene glycol
B
1,2,3,4-butanetetrol
C
ethylene glycol
D
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With ruthenium-carbon composite; hydrogen In water at 215℃; under 39003.9 Torr; for 1.5h; Catalytic behavior; Reagent/catalyst; Autoclave; | A 9.6% B 9% C 40.6% D 7.8% |
glycerol
A
LACTIC ACID
B
propylene glycol
C
ethanol
D
ethylene glycol
E
2.3-butanediol
F
1,2-dihydroxybutane
G
pentane-1,3-diol
Conditions | Yield |
---|---|
With sodium hydroxide; hydrogen; solid catalyst similar to the “G” catalyst disclosed in U.S. Pat. No. 6,479,713 or the “HC-1” catalyst available from Sud Chemie (Louisville, Ky.) In water at 178 - 198℃; under 62059.4 Torr; Product distribution / selectivity; | A 1% B 38% C 0.1% D 1.6% E n/a F n/a G n/a |
Conditions | Yield |
---|---|
With hydrogen; 5%-palladium/activated carbon In ethanol at 20℃; under 2625.26 Torr; for 16h; | 37% |
D-glucose
A
propylene glycol
B
ethylene glycol
C
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With palladium on activated charcoal; water; zinc at 250℃; for 0.5h; Temperature; | A 33.3% B 7.1% C 7.6% |
With 5% active carbon-supported ruthenium; hydrogen; ortho-tungstic acid; sodium hydroxide In water; glycerol at 200℃; under 37503.8 Torr; for 4h; |
glycerol
A
methanol
B
LACTIC ACID
C
propylene glycol
D
ethylene glycol
E
2.3-butanediol
F
1,2-dihydroxybutane
G
pentane-1,3-diol
Conditions | Yield |
---|---|
With sodium hydroxide; hydrogen; solid catalyst similar to the “G” catalyst disclosed in U.S. Pat. No. 6,479,713 or the “HC-1” catalyst available from Sud Chemie (Louisville, Ky.) In water at 185 - 205℃; under 82745.9 Torr; Product distribution / selectivity; | A 0.7% B 0.5% C 33.2% D 1.5% E n/a F n/a G n/a |
glycerol
A
LACTIC ACID
B
propylene glycol
C
ethylene glycol
D
2.3-butanediol
E
1,2-dihydroxybutane
F
pentane-1,3-diol
Conditions | Yield |
---|---|
With sodium hydroxide; hydrogen at 177 - 228℃; under 62059.4 - 82745.9 Torr; Product distribution / selectivity; | A 0.5% B 33.2% C 1.5% D n/a E n/a F n/a |
Conditions | Yield |
---|---|
With triethylamine In toluene Cyclization; | 99% |
Conditions | Yield |
---|---|
With ruthenium(III) acetate at 20℃; for 8h; | 99% |
1,2-dihydroxybutane
[Ti(N-phenylsalicylideneimine(-H))2(OCH2CH(C2H5)O)]
Conditions | Yield |
---|---|
In benzene byproducts: (CH3)2CHOH; under unhydrous atm., soln. of ligand added to soln. of Ti compd. (3.06:3.01), refluxed, monitored by isopropanol liberated; concd., crystd., elem. anal.; | 99% |
carbon dioxide
1,2-dihydroxybutane
1,2-butylene carbonate
Conditions | Yield |
---|---|
With 2-Cyanopyridine; cerium(IV) oxide at 139.84℃; under 37503.8 Torr; for 1h; Autoclave; | 99% |
With 1,10-Phenanthroline; calcium carbide; zinc trifluoromethanesulfonate In 1-methyl-pyrrolidin-2-one at 180℃; under 37503.8 Torr; for 24h; Autoclave; Glovebox; Sealed tube; | 82% |
Stage #1: carbon dioxide With 1-butyl-3-methyl-1H-imidazol-3-iumhydrogencarbonate at 25℃; under 760.051 Torr; for 6h; Stage #2: 1,2-dihydroxybutane at 25℃; under 760.051 Torr; for 12h; | 40.4% |
With 1,8-diazabicyclo[5.4.0]undec-7-ene; 2-methyl-but-3-yn-2-ol In N,N-dimethyl-formamide at 120℃; under 22502.3 Torr; for 10h; Autoclave; | 99 %Chromat. |
With tetraethylammonium iodide In acetonitrile at 20℃; under 760.051 Torr; Electrolysis; | 47.6 %Chromat. |
carbonic acid dimethyl ester
1,2-dihydroxybutane
1,2-butylene carbonate
Conditions | Yield |
---|---|
In neat (no solvent) at 110℃; for 24h; Temperature; Green chemistry; | 99% |
With zinc(II) trifluoroacetate hydrate; 1,3-bis(imidazol-1-ylmethyl)benzene for 9h; Reagent/catalyst; Reflux; | |
With tetrabutylammomium bromide at 180℃; under 8250.83 Torr; for 0.05h; Flow reactor; | |
With sodium methylate In methanol at 64 - 90℃; |
1,4-diaza-bicyclo[2.2.2]octane
Thiophene-2,5-dicarboxylic acid
1,2-dihydroxybutane
Conditions | Yield |
---|---|
Stage #1: 1,4-diaza-bicyclo[2.2.2]octane; Thiophene-2,5-dicarboxylic acid; zinc(II) nitrate hexahydrate In N,N-dimethyl-formamide for 1h; Stage #2: 1,2-dihydroxybutane In N,N-dimethyl-formamide at 130℃; for 48h; Sealed tube; | 99% |
Conditions | Yield |
---|---|
In benzene refluxing (10 h); recrystn. (benzene/CH2Cl2); elem. anal.; | 98.95% |
Conditions | Yield |
---|---|
With iron(III) chloride hexahydrate at 20℃; for 2h; | 98% |
Conditions | Yield |
---|---|
With C29H44IrN5P2; potassium tert-butylate In diethylene glycol dimethyl ether at 130℃; for 20h; Solvent; Reagent/catalyst; Temperature; Inert atmosphere; Glovebox; | 98% |
carbon monoxide
1,2-dihydroxybutane
1,2-butylene carbonate
Conditions | Yield |
---|---|
With N-chloro-succinimide; (neocuproine)Pd(OAc)2; sodium acetate In acetonitrile at 55℃; under 760.051 Torr; for 24h; Molecular sieve; | 97% |
With air; potassium iodide; palladium(II) iodide In ISOPROPYLAMIDE at 100℃; under 15201 Torr; for 15h; Autoclave; | 94% |
With oxygen; potassium iodide; palladium(II) iodide In N,N-dimethyl acetamide at 100℃; under 15201 Torr; for 15h; | 94% |
With triethylamine; copper dichloride 1.) THF, 30 kg/cm2, 80 deg C, 4h, 2.) room temp, 18 h, 1 atm; Yield given. Multistep reaction; | |
With oxygen; sodium carbonate; copper dichloride In acetonitrile at 100℃; under 22502.3 Torr; for 3h; Autoclave; |
tert-butylchlorodiphenylsilane
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With 4-methylpyridine-1-oxide In dichloromethane at 20℃; Molecular sieve; regioselective reaction; | 97% |
carbon dioxide
2-methyl-but-3-yn-2-ol
1,2-dihydroxybutane
A
1,2-butylene carbonate
B
3-Hydroxy-3-methyl-2-butanone
Conditions | Yield |
---|---|
With 1,8-diazabicyclo[5.4.0]undec-7-ene; zinc(II) chloride In acetonitrile at 80℃; under 7500.75 Torr; for 24h; Autoclave; Sealed tube; chemoselective reaction; | A 97% B 65 %Chromat. |
Stage #1: carbon dioxide; 2-methyl-but-3-yn-2-ol With C15H18N2O2 In acetonitrile at 25℃; under 760.051 Torr; for 24h; Inert atmosphere; Schlenk technique; Stage #2: 1,2-dihydroxybutane With 1-methyl-2,3,4,6,7,8-hexahydro-1H-pyrimido[1,2-a]pyrimidine In acetonitrile at 25℃; for 24h; Inert atmosphere; Schlenk technique; | A 89 %Spectr. B n/a |
Conditions | Yield |
---|---|
Stage #1: 1,4-diaza-bicyclo[2.2.2]octane; zinc(II) nitrate hexahydrate; isophthalic acid In N,N-dimethyl-formamide for 1h; Stage #2: 1,2-dihydroxybutane In N,N-dimethyl-formamide at 130℃; for 48h; | 96% |
Conditions | Yield |
---|---|
With phosphorus pentoxide; silica gel at 20℃; | 95% |
With dmap; triethylamine In dichloromethane at 20℃; for 16h; Cooling with ice; | 86% |
With sulfuric acid for 0.25h; Heating; | 73% |
With pyridine |
Conditions | Yield |
---|---|
With C39H31BMnNO2P2; potassium hydride In toluene at 150℃; for 36h; | 95% |
With cesiumhydroxide monohydrate In toluene at 150℃; for 24h; Inert atmosphere; Sealed tube; | 94% |
With 1,10-Phenanthroline; cesiumhydroxide monohydrate; nickel dibromide In toluene at 150℃; for 24h; Inert atmosphere; Sealed tube; | 93% |
Conditions | Yield |
---|---|
toluene-4-sulfonic acid In water; toluene at 135℃; for 4h; Heating / reflux; with Dean-Stark tube; | 94.3% |
urea
1,2-dihydroxybutane
1,2-butylene carbonate
Conditions | Yield |
---|---|
With 1-hexadecyl-3-methylimidazolium chloride; zinc(II) chloride In neat (no solvent) at 160℃; under 112.511 Torr; for 3h; Green chemistry; | 94.3% |
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With water-d2; phospho(enol)pyruvic acid mono potassium salt; adenosine 5'-triphosphate disodium salt; barium(II) chloride; magnesium chloride; glycerol kinase from S. cerevisiae or from E. coli and pyruvate kinase In various solvent(s) for 72h; Ambient temperature; | 94% |
Conditions | Yield |
---|---|
With cesiumhydroxide monohydrate In toluene at 150℃; for 24h; Inert atmosphere; Sealed tube; | 94% |
With 1,10-Phenanthroline; cesiumhydroxide monohydrate; nickel dibromide In toluene at 150℃; for 24h; Inert atmosphere; Sealed tube; | 92% |
With trimethylamine-N-oxide; tricarbonyl(η4-1,3-bis(trimethylsilyl)-4,5,6,7-tetrahydro-2H-inden-2-one)iron In toluene at 150℃; for 24h; Green chemistry; | 78% |
Conditions | Yield |
---|---|
With Amberlyst15 In cyclohexane Reflux; | 94% |
5-exo-methylbicyclo-[2.2.1]heptan-2-exo-ol
1,2-dihydroxybutane
Conditions | Yield |
---|---|
With naphthalene-1,5-disulfonate In benzene at 80℃; for 3h; | 92.9% |
acetyl chloride
1,2-dihydroxybutane
A
1,2-butanediol diacetate
B
(+/-)-2-hydroxybutyl acetate
Conditions | Yield |
---|---|
With 2,4,6-trimethyl-pyridine In dichloromethane at -78℃; Yields of byproduct given; | A n/a B 92% |
With 2,4,6-trimethyl-pyridine In dichloromethane at -78℃; Yield given. Yields of byproduct given; |
1,2-dihydroxybutane
2-Hydroxybutanoic acid
Conditions | Yield |
---|---|
With C24H33IrN4O3; water; sodium carbonate for 18h; Reflux; | 92% |
at 35℃; for 12h; Product distribution; production by resting cells of sp. strain TB-42; optimization of culture medium for preparation of this strain; effect of CaCO3; effect of aeration; pH 7.0; effect of temperature; |
p-toluenesulfonyl chloride
1,2-dihydroxybutane
1,2-Bis(4-toluenesulfonyloxy)butane
Conditions | Yield |
---|---|
With trimethylamine hydrochloride; triethylamine In acetonitrile at 0 - 5℃; for 1h; | 92% |
With N,N,N',N'-tetramethylhexamethylenediamine In acetonitrile at 0 - 5℃; for 1h; Tosylation; | 91% |
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