140421-91-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 140421-91-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,0,4,2 and 1 respectively; the second part has 2 digits, 9 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 140421-91:
(8*1)+(7*4)+(6*0)+(5*4)+(4*2)+(3*1)+(2*9)+(1*1)=86
86 % 10 = 6
So 140421-91-6 is a valid CAS Registry Number.
140421-91-6Relevant articles and documents
ACYLPHOSPHONIUM COMPOUNDS OF COUMARIN
Yagodinets, P. I.,Skripskaya, O. V.,Chernyuk, I. N.,Shevchuk, M. I.
, p. 1714 - 1719 (2007/10/02)
The reaction of 3-(ω-bromoacetyl)coumarin with triphenylphosphine gives 3-coumarinocarbomethyltriphenylphosphonium bromide.The corresponding phoshorylide reacts readily with aldehydes to form coumarin analogs of chalcones.The acetylphosphonium salt and th