Welcome to LookChem.com Sign In|Join Free

CAS

  • or

18439-35-5

Post Buying Request

18439-35-5 Suppliers

Recommended suppliersmore

  • Product
  • FOB Price
  • Min.Order
  • Supply Ability
  • Supplier
  • Contact Supplier

18439-35-5 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 18439-35-5 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,8,4,3 and 9 respectively; the second part has 2 digits, 3 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 18439-35:
(7*1)+(6*8)+(5*4)+(4*3)+(3*9)+(2*3)+(1*5)=125
125 % 10 = 5
So 18439-35-5 is a valid CAS Registry Number.

18439-35-5Relevant articles and documents

On the nature of the electronic effect of multiple hydroxyl groups in the 6-membered ring-the effects are additive but steric hindrance plays a role too

Pedersen, Christian Marcus,Bols, Mikael

, p. 1164 - 1173 (2017)

Research during the last two decades has shown a remarkable directional component of the substituent effects of hydroxy groups, which has a profound effect on the properties of hydroxylated compounds such as carbohydrates. While the epimerisation of a single hydroxyl function is well studied the consequence of multiple epimerisations is more speculative. In this work the effect of three epimerisations was investigated. To this end epimeric 2-phenyl iminoxylitols that have a phenyl group as a conformational anchor and thus hydroxyl groups in the axial or equatorial position, respectively, were synthesized and their pKa and conformation were studied. The results show that the large difference in the electronic effect between the axial and equatorial hydroxyls is partially cancelled by counteracting steric hindrance from 1,3-diaxial interactions. Hydrogen bonding does not appear to play any role in the electronic influence of the hydroxyl groups.

Divergent total synthesis of crassalactones B and C and evaluation of their antiproliferative activity

Benedekovi?, Goran,Kova?evi?, Ivana,Popsavin, Mirjana,Francuz, Jovana,Koji?, Vesna,Bogdanovi?, Gordana,Popsavin, Velimir

, p. 4581 - 4589 (2015/06/08)

A divergent total synthesis of cytotoxic natural products (+)-crassalactones B (2) and C (3) has been achieved by utilizing diacetone d-glucose (4) as a chiral precursor. The key steps of the synthesis of both targets 2 and 3 were a stereo-selective addit

Stereoselective total synthesis of styryl-lactones: (+)-crassalactones B and C, (+)-howiionol A, (+)-tricinnamate, (+)-goniofufurone and (+)-dicinnamoyl goniofufurone

Sharma, Gangavaram V.M.,Mallesham, Samala

experimental part, p. 2646 - 2658 (2011/02/16)

The total synthesis of (+)-crassalactone B, (+)-crassalactone C, (+)-howiionol A, (+)-tricinnamate, (+)-goniofufurone, and (+)-dicinnamoyl goniofufurone is achieved by a 'chiron approach' starting from diacetone d-glucose (DAG). Mitsunobu inversion, Wittig olefination and ring closing metatheses were used as key steps for (+)-howiionol A and (+)-tricinnamate. Meldrum's acid was used for the synthesis of (+)-crassalactone C, (+)-goniofufurone, and (+)-dicinnamoyl goniofufurone. Yamaguchi esterification was used for (+)-crassalactone B, while a Grignard reaction followed by concomitant deallylation was first reported in the synthesis of (+)-dicinnamoyl goniofufurone.

Post a RFQ

Enter 15 to 2000 letters.Word count: 0 letters

Attach files(File Format: Jpeg, Jpg, Gif, Png, PDF, PPT, Zip, Rar,Word or Excel Maximum File Size: 3MB)

1

What can I do for you?
Get Best Price

Get Best Price for 18439-35-5