117211-57-1 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 117211-57-1 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,1,7,2,1 and 1 respectively; the second part has 2 digits, 5 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 117211-57:
(8*1)+(7*1)+(6*7)+(5*2)+(4*1)+(3*1)+(2*5)+(1*7)=91
91 % 10 = 1
So 117211-57-1 is a valid CAS Registry Number.
117211-57-1Relevant articles and documents
SYNTHESIS OF (+/-)-14-EPIUPIAL BY MANGANESE(III) γ-LACTONE ANNULATION
Paquette, Leo A.,Schaefer, Anthony G.,Springer, James P.
, p. 5567 - 5582 (2007/10/02)
The total synthesis of racemic 14-epiupial (3) is described.The preparation of 3 is achieved in 23 steps starting from 8.In the key step, manganese(III) acetate acts on the monocarboxylic acid derived from 17b to promote concurrent formation of the bicycl
