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1309272-63-6

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1309272-63-6 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1309272-63-6 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,3,0,9,2,7 and 2 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 1309272-63:
(9*1)+(8*3)+(7*0)+(6*9)+(5*2)+(4*7)+(3*2)+(2*6)+(1*3)=146
146 % 10 = 6
So 1309272-63-6 is a valid CAS Registry Number.

1309272-63-6Relevant articles and documents

Preparation of functional benzofurans, benzothiophenes, and indoles using ester, thioester, and amide via intramolecular wittig reactions

Syu, Siang-En,Lee, Yu-Ting,Jang, Yeong-Jiunn,Lin, Wenwei

supporting information; experimental part, p. 2970 - 2973 (2011/06/27)

Preparation of new types of highly functional benzofurans, benzothiophenes, and indoles is realized via intramolecular Wittig reactions with the corresponding ester, thioester, and amide functionalities. The key intermediates, phosphorus ylides, presumably result from the addition of Bu 3P toward aldehydes followed by acylation and deprotonation. Synthesis of functional benzofurans directly starting from salicylic aldehyde derivatives with acid chlorides in a one-step procedure is also developed.

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