138842-63-4 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 138842-63-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,8,8,4 and 2 respectively; the second part has 2 digits, 6 and 3 respectively.
Calculate Digit Verification of CAS Registry Number 138842-63:
(8*1)+(7*3)+(6*8)+(5*8)+(4*4)+(3*2)+(2*6)+(1*3)=154
154 % 10 = 4
So 138842-63-4 is a valid CAS Registry Number.
138842-63-4Relevant articles and documents
Asymmetric Diels Alder reactions and Michael type additions with 6(R)-3'(R)-pantolactone-substituted-2H-pyran-3(6H)-one
Knol,Jansen,Van Bolhuis,Feringa
, p. 7465 - 7468 (2007/10/02)
The preparation of optically pure pyranone 2a, using d-pantolactone as a chiral auxiliairy, and its successful application in Diels Alder and Michael type additions with d.r's of 89/11 up to 100/0 is described.