78133-72-9 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 78133-72-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 7,8,1,3 and 3 respectively; the second part has 2 digits, 7 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 78133-72:
(7*7)+(6*8)+(5*1)+(4*3)+(3*3)+(2*7)+(1*2)=139
139 % 10 = 9
So 78133-72-9 is a valid CAS Registry Number.
78133-72-9Relevant articles and documents
6-Diazopenicillanates. Part 1. Reactions with Furans
Matlin, Stephen A.,Chan, Lam,Catherwood, Bettina
, p. 89 - 96 (2007/10/02)
Benzhydryl, p-nitrobenzyl, and pivaloyloxymethyl esters of 6-diazopenicillanic acid undergo rhodium-catalysed reactions with furan giving 6-(4'-oxobut-2-enylidene)penicillanates in high yields.Substitution on the furan ring results in a strong steric effe
