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203926-55-0

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203926-55-0 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 203926-55-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,9,2 and 6 respectively; the second part has 2 digits, 5 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 203926-55:
(8*2)+(7*0)+(6*3)+(5*9)+(4*2)+(3*6)+(2*5)+(1*5)=120
120 % 10 = 0
So 203926-55-0 is a valid CAS Registry Number.

203926-55-0Relevant articles and documents

Synthetic Studies toward the C32-C46 Segment of Hemicalide. Assignment of the Relative Configuration of the C36-C42 Subunit

Specklin, Simon,Boissonnat, Guillaume,Lecourt, Camille,Sorin, Geoffroy,Lannou, Marie-Isabelle,Ardisson, Janick,Sautel, Fran?ois,Massiot, Georges,Meyer, Christophe,Cossy, Janine

supporting information, p. 2446 - 2449 (2015/05/27)

The synthesis of five diastereomeric model compounds incorporating the C32-C46 segment of the antitumor marine natural product hemicalide has been achieved through a convergent approach relying on the 1,4-addition of an alkenyl boronate to an α,β-unsaturated δ-lactone followed by α-hydroxylation of an enolate and a Julia-Kocienski olefination. Comparison of the 1H and 13C NMR data of the model compounds with those of hemicalide enabled the assignment of the relative configuration of the C36-C42 subunit. (Chemical Equation Presented).

Total Synthesis of Cryptophycins-1, -3, -4, -24 (Arenastatin A), and -29, Cytotoxic Depsipeptides from Cyanobacteria of the Nostocaceae

White, James D.,Hong, Jian,Robarge, Lonnie A.

, p. 6206 - 6216 (2007/10/03)

A convergent synthesis of cryptophycins has been developed in which (5S,6R)-5-hydroxy-6-methyl-8-phenylocta-2(E),7(E)-dienoic acid (A) is coupled with an amino acid segment (B). Two stereo-selective routes to A are described, the first employing allylatio

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