143237-81-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 143237-81-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,4,3,2,3 and 7 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 143237-81:
(8*1)+(7*4)+(6*3)+(5*2)+(4*3)+(3*7)+(2*8)+(1*1)=114
114 % 10 = 4
So 143237-81-4 is a valid CAS Registry Number.
143237-81-4Relevant articles and documents
PREPARATION OF (2S*,5S*)-2,5-DIBENZYL PHOSPHOLANIC ACID.
Polniaszek, Richard P.
, p. 127 - 130 (2007/10/02)
Phosphenium ion 1 underwent cheletropic cycloaddition with E-1-benzylbutadiene 2b to afford cyclic phosphonium salts produced phosphinamides 6a and 6b in a 3:1 ratio.Three chemical steps coverted phosphinamide 6a to the title compound 12b.