185317-33-3 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 185317-33-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,8,5,3,1 and 7 respectively; the second part has 2 digits, 3 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 185317-33:
(8*1)+(7*8)+(6*5)+(5*3)+(4*1)+(3*7)+(2*3)+(1*3)=143
143 % 10 = 3
So 185317-33-3 is a valid CAS Registry Number.
185317-33-3Relevant articles and documents
Oxidative Addition of 1,3-Dicarbonyl Compounds to Conjugated Olefins
Vinogradov, Maxim G.,Kondorsky, Alexander E.,Nikishin, Gennady I.
, p. 60 - 62 (2007/10/02)
A convenient one step synthesis of the 5-aryl- or 5-(1-alkenyl)-4,5-dihydrofurans from 1,3-dicarbonyl compounds and conjugated olefins in the presence of copper(II) chloride/pyridine or copper(II) chloride/pyridine/oxygen is reported.