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1427683-17-7

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1427683-17-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1427683-17-7 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,4,2,7,6,8 and 3 respectively; the second part has 2 digits, 1 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 1427683-17:
(9*1)+(8*4)+(7*2)+(6*7)+(5*6)+(4*8)+(3*3)+(2*1)+(1*7)=177
177 % 10 = 7
So 1427683-17-7 is a valid CAS Registry Number.

1427683-17-7Downstream Products

1427683-17-7Relevant articles and documents

The new convenient synthesis of novel γ-alkylidenebutenolides from 6-aminopenicillanic acid

Yu, Bin,Zhang, En,Fang, Yuan,Sun, Xiao-Nan,Ren, Jing-Li,Yu, De-Quan,Liu, Hong-Min

, p. 163 - 176 (2013/03/13)

Butenolides have good biological activity and serve as the important unit of pharmaceutical intermediates, of which γ-alkylidenebutenolides have gained wide attention over the last past decades particularly. A simple and practical method for the synthesis of butenolide 6 and its 5-substituted analogues 7a-t via vinylogous aldol reaction from 6-aminopenicillanic acid (6-APA) with the ratio of Z/E isomers between 1.1/1.0 and 1.0/0 under mild conditions in 6 steps was first reported. Besides, we also reported the methanolysis behaviors of azetidinone fused oxazoline derivatives. All the synthesized γ-alkylidenebutenolides are new and are currently being evaluated for their biological activities.

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