177211-80-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 177211-80-2 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,7,2,1 and 1 respectively; the second part has 2 digits, 8 and 0 respectively.
Calculate Digit Verification of CAS Registry Number 177211-80:
(8*1)+(7*7)+(6*7)+(5*2)+(4*1)+(3*1)+(2*8)+(1*0)=132
132 % 10 = 2
So 177211-80-2 is a valid CAS Registry Number.
177211-80-2Relevant articles and documents
Synthesis of 1H- and 5H-1,3-diazepines from azido- and tetrazolo-pyridines
Reisinger, Ales,Wentrup, Curt
, p. 813 - 814 (1996)
Stable 1H-1,3-diazepines 7-9, 10, 13, 14, 17 and 19 are obtained, often in high yields, by photolysis of trifluoromethyl-substituted azido- or tetrazolo-pyridines in the presence of alcohols or amines; in some cases, 5H-1,3-diazepines are also formed (11, 21 and 23).
