172226-78-7 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 172226-78-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,7,2,2,2 and 6 respectively; the second part has 2 digits, 7 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 172226-78:
(8*1)+(7*7)+(6*2)+(5*2)+(4*2)+(3*6)+(2*7)+(1*8)=127
127 % 10 = 7
So 172226-78-7 is a valid CAS Registry Number.
172226-78-7Relevant articles and documents
Benzocarbapenems from ethyl indole-2-acetate
Gilchrist,Graham,Coulton
, p. 8693 - 8696 (1995)
The benzocarbapenem 1 has been prepared from ethyl indole-2-acetate by reduction, hydrolysis of the ester and cyclisation. The methyl substituted carbapenems 12, 13 and 14 have also been prepared. The hydrogenation of ethyl N-BOC-indole-2-propanoate 5 is diastereoselective.