87216-28-2 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 87216-28-2 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 8,7,2,1 and 6 respectively; the second part has 2 digits, 2 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 87216-28:
(7*8)+(6*7)+(5*2)+(4*1)+(3*6)+(2*2)+(1*8)=142
142 % 10 = 2
So 87216-28-2 is a valid CAS Registry Number.
87216-28-2Relevant articles and documents
Quinazolines and 1,4-benzodiazepines. XCIV. Pyrazino[1,2-a][1,4]benzodiazepines
Walser,Flynn,Fryer
, p. 791 - 793 (2007/10/02)
A series of pyrazino[1,2-a][1,4]benzodiazpines were prepared by acylating the primary amino group of an α-amino-1,4-benzodiazepine-2-ylideneacetic acid ester (1) with α-chloroacyl chlorides followed by cyclodehydrohalogenation with triethylamine in dimeth