203503-64-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 203503-64-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,0,3,5,0 and 3 respectively; the second part has 2 digits, 6 and 4 respectively.
Calculate Digit Verification of CAS Registry Number 203503-64:
(8*2)+(7*0)+(6*3)+(5*5)+(4*0)+(3*3)+(2*6)+(1*4)=84
84 % 10 = 4
So 203503-64-4 is a valid CAS Registry Number.
203503-64-4Relevant articles and documents
BINOL derived C2-symmetric bis-sulfinates as efficient sulfinyl transfer agents in the synthesis of tert-butyl sulfoxides
Gaggero,Albanese
, p. 7129 - 7132 (2012)
The reaction of novel C2-symmetric bis-sulfinate esters derived from (R)-BINOL with Grignard reagents affords tert-butyl sulfoxides in ee up to 97%. The desired enantiomer can be generated at will by the proper selection of BINOL.
