137643-12-0 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137643-12-0 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,6,4 and 3 respectively; the second part has 2 digits, 1 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 137643-12:
(8*1)+(7*3)+(6*7)+(5*6)+(4*4)+(3*3)+(2*1)+(1*2)=130
130 % 10 = 0
So 137643-12-0 is a valid CAS Registry Number.
137643-12-0Relevant academic research and scientific papers
Facile synthesis of novel spiro[azetidine-2,4'(1H)-isoquinoline-1',3',4(2'H)-triones]
Malamas
, p. 565 - 568 (2007/10/02)
A convenient general method for the synthesis of a new heterocycle, spiro[azetidine-2,4'(1'H)-isoquinoline-1',3',4(2'H)-trione] is described. The key intermediate 2 was prepared by direct halogenation of position-4 of acid 3 with thionyl chloride, and sub
