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1169762-19-9

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1169762-19-9 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1169762-19-9 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,1,6,9,7,6 and 2 respectively; the second part has 2 digits, 1 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 1169762-19:
(9*1)+(8*1)+(7*6)+(6*9)+(5*7)+(4*6)+(3*2)+(2*1)+(1*9)=189
189 % 10 = 9
So 1169762-19-9 is a valid CAS Registry Number.

1169762-19-9Relevant articles and documents

Convenient synthesis of 4-tert-butyl 2-ethyl 3-amino-1-benzyl-5- dialkylamino-1H-pyrrole-2,4-dicarboxylate derivatives

Nishio, Yukihiro,Uchiyama, Katsuya,Kito, Makoto,Nakahira, Hiroyuki

, p. 3124 - 3131 (2011/05/17)

Optimization details and limitations of a novel synthetic method of 4-tert-butyl 2-ethyl 3-amino-1-benzyl-5-dialkylamino-1H-pyrrole-2,4- dicarboxylate derivatives are herein disclosed. This synthesis consists of four steps that include a highly selective cyclization, and can be carried out from starting materials to target compounds without column chromatography purification. The high selectivity is controlled by lithium coordination and steric hindrance caused by tert-butyl ester.

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