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87273-80-1

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87273-80-1 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 87273-80-1 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,2,7 and 3 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 87273-80:
(7*8)+(6*7)+(5*2)+(4*7)+(3*3)+(2*8)+(1*0)=161
161 % 10 = 1
So 87273-80-1 is a valid CAS Registry Number.

87273-80-1Downstream Products

87273-80-1Relevant articles and documents

A systematic study of reaction of heterocyclic enamines with electrophilic alkynes: A simple and efficient synthetic route to 2- pyridinone-fused heterocycles

Wang, Mei-Xiang,Miao, Wei-Shi,Cheng, Ying,Huang, Zhi-Tang

, p. 14611 - 14622 (2007/10/03)

The reaction of heterocyclic enamines with ethyl propiolate and diethyl acetylenedicarboxylate has been systematically studied. In contrast to their heterocyclic ketene aminal analogues, heterocyclic enamines reacted with electrophilic alkynes via the Michael addition pathway rather than the aza- ene reaction mechanism. In the presence of a strong base such as sodium ethoxide and sodium hydride, the resulting Michael addition products underwent cyclocondensation reaction readily to produce 2-pyridinone-fused heterocycles in good to excellent yield.

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