137156-81-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 137156-81-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,7,1,5 and 6 respectively; the second part has 2 digits, 8 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 137156-81:
(8*1)+(7*3)+(6*7)+(5*1)+(4*5)+(3*6)+(2*8)+(1*1)=131
131 % 10 = 1
So 137156-81-1 is a valid CAS Registry Number.
137156-81-1Relevant articles and documents
Facile ring opening of 2-aryl[1,3,4]oxadiazino[5,6-b]quinoxalines with sodium alkoxides
Dubey,Naidu,Vijaya,Vineel, B. George
, p. 573 - 576 (2007/10/03)
Reactions of 2,3-dichloroquinoxaline 1 with various acid hydrazides 2 in acetonitrile under PTC conditions give the corresponding oxadiazinoquinoxalines 3, which on reaction with sodium alkoxides in alcohol yielded the respective ring opened products i.e.
