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221377-36-2

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221377-36-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221377-36-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,3,7 and 7 respectively; the second part has 2 digits, 3 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 221377-36:
(8*2)+(7*2)+(6*1)+(5*3)+(4*7)+(3*7)+(2*3)+(1*6)=112
112 % 10 = 2
So 221377-36-2 is a valid CAS Registry Number.

221377-36-2Relevant articles and documents

Synthesis of rebeccamycin and 11-dechlororebeccamycin

Faul,Winneroski,Krumrich

, p. 2465 - 2470 (2007/10/03)

Glycosylated 7-chloroindole-3-acetamide 9, prepared in four steps and 26% yield from 7-chloroindole (1), was condensed with methyl 7-chloroindole- 3-glyoxylate 11 and methyl indole-3-glyoxylate 12 to provide bisindolylmaleimides 7 and 8 in 86% and 84% yield, respectively. Oxidation of 7 and 8 followed by debenzylation provided a new approach to the synthesis of rebeccamycin and completed for the first time a synthesis of 11- dechlororebeccamycin.

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