Sterically congested 1-(phenylthio)-9-aryldibenzochalcogenophenes were prepared and photolyzed with a 400 W high pressure Hg lamp in benzene to afford triphenyleno[4,5-bcd]thiophenes.
Thiophene end-capped aromatic analogues, that is, naphthothiophenes, naphthodithiophenes, pyrenothiophene, and benzotrithiophene, can be prepared from commercially available hydroxyarenes in two steps, including (1) a consecutive acid-mediated nucleophilic aromatic substitution of hydroxyarenes ...
Zeolite beta was dealuminated by thermal and acid treatment methods. Cyclisation of (phenylthio)acetaldehyde diethylacetal was carried out over these dealuminated zeolites with a view of obtaining benzo[b]thiophene. The yield of benzo[b]thiophene is higher in the presence of acid-dealuminated be...
In the presence of catalytic amounts of RhH(PPh3)4 and 1,2-bis(diphenylphosphino)ethane (dppe), 1,3-benzothiazoles, 1,3-benzoxazoles, and benzothiophene reacted with α-(phenylthio)isobutyrophenone giving 2-phenylthio derivatives. Reactive monocyclic heteroaromatics, 1-methyl-1,2,3,4-tetrazole a...
A parallel solid-phase synthesis of 2,4,5-trisubstituted thiophene-3-carbonitrile derivatives was developed. The polymer-supported synthetic route progressed using the sulfide linker via a traceless strategy. The initial synthesis utilized the Thorpe–Ziegler type cyclization of α-haloketone an...
Fairly stable tris(polychlorophenyl)thallium(III) R3Tl (I, R = C6Cl5; II, R = 2,3,5,6-C6HCl4) have been prepared from thallic chloride and the corresponding chlorophenyllithium. I and II react with some amines forming 11 complexes. II reacts with M(π-C3H5)ClL (M = Pd or Pt, L = PPh3 or pyridine...
The quadridentate ligand tris-(o-diphenylphosphinophenyl) phosphine (QP) forms complexes with cobalt(II) of the type [CoX(QP)]Y which have S = 12 and which have been assigned a distorted trigonal bipyramidal structure. Trigonal-bipyramidal, diamagnetic, complexes of cobalt(I) of the type [Co(CO)...
The action of pyridine, α-,β-,γ-picoline, 2,4-lutidne and PEt3 on CCl4 solutions of [NiCl(C6Cl5)(PPh3)]2 gives the new compounds [NiCl(C6Cl5)L(PPh3)]. In the case of pyridine only, use of an excess of the base gives the compound [NiCl(C6Cl5)(py)2]. The concomitant formation of [NiCl(C6Cl5)(PP...
The preparation of Pd(C6Cl5)2L2 by reacting Pd Cl2L2 with LiC6C/5 can be achieved for L being a N-, As- or S-ligand but not for L = phosphine. The As- or S- ligand can thereafter be replaced by other monoor bidentate ligands, even by phosphines.
The chain-like organic compounds with conjugated structure have the potential to become high temperature superconductors. Here, we show that p-quinquephenyl containing five phenyl rings connected in para position is superconducting when the compound is doped by potassium, with a critical tempera...
A series of novel side-chain liquid-crystalline polymers (SCLCPs) consisting of laterally attached photoluminescent p-quinquephenyl (QQP) pendants with different flexible terminal- and/or side-alkoxy chains were synthesized via atom transfer radical polymerization (ATRP). Homopolymers (HP1–HP3)...
Two soluble phosphorescent host materials, 1,4-bis(3,6-di([1,1′:3′,1″:3″,1‴:3‴,1⁗-quinquephenyl]-5″-yl)-9H-carbazol-9-yl)benzene (P-mPCCP) and 1,4-bis(3,6-bis(4,4″-di-tert-butyl-[1,1′:3′,1″-terphenyl]-5′-yl)-9H-carbazol-9-yl) benzene (T-mPCCP) derived form carbazole and m-terphenyl der...
The monomer reactivity ratios for the copolymerization of methyl methacrylate (M1), styrene (M1), butyl acrylate (M1) and acrylamide (M1) with tri-n-butyltin maleate (M2) have been found to be r1 = 15.40, r2 = 0.01; r1 = 6.70, r2 = 0.05; r1 = 9.39, r2 = 0.11; and r1 = 122.44, r2 = 0.06, respecti...
Tin protoporphyrin (SnPP), a heme oxygenase (HO) inhibitor, can paradoxically protect against diverse forms of acute kidney injury (AKI). This study sought potential underlying mechanisms. CD-1 mice received intravenous SnPP, followed 4–18 hours later by a variety of renal biochemical, histolog...
Introduction of halogen into the maleate residues of organotin maleates reduced the ability of these compounds to stabilize PVC against thermal degradation. The reasons for this effect are discussed and it is shown that the organotin halogenomaleates have reduced thermal stability.
Here, we report the synthesis and characterization of a novel 4-arm poly(lactic acid urethane)-maleate (4PLAUMA) elastomer and its composites with nano-hydroxyapatite (nHA) as potential weight-bearing composite. The 4PLAUMA/nHA ratios of the composites were 1:3, 2:5, 1:2 and 1:1. FTIR and NMR ch...
Tin is present in low concentrations in most canned foods and beverages, the highest levels being found in products packaged in unlacquered or partially lacquered tinplate cans. A limited number of case-reports of acute gastrointestinal disorders after consumption of food containing 100–500 mg/...
The copolymerization of tri-n-butylstannylallyl maleate and the monoallyl ester of maleic acid with styrene has been studied. It has been shown that, in the monomer systems investigated, alternating copolymerization occurs and the equimolar composition of the copolymers formed does not depend up...
Investigations were made on the effects of alkyl(aryl)tin salts of maleic and thioglycolic acids and their esters upon the rate of dehydrochlorination and crosslinking, and on the absorption spectrum of PVC during degradation in vacuum at 190°. It was shown that these stabilizers cause dehydroc...
The phenomenon known as renal “ischemic preconditioning,” whereby an initial ischemic insult induces resistance against subsequent kidney damage, has been well established in the experimental literature. However, a clinically applicable way to safely recapitulate this state has not been define...
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View