637338-96-6 Usage
Check Digit Verification of cas no
The CAS Registry Mumber 637338-96-6 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 6,3,7,3,3 and 8 respectively; the second part has 2 digits, 9 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 637338-96:
(8*6)+(7*3)+(6*7)+(5*3)+(4*3)+(3*8)+(2*9)+(1*6)=186
186 % 10 = 6
So 637338-96-6 is a valid CAS Registry Number.
637338-96-6Relevant articles and documents
Stereospecific total synthesis of (-)-8-epi-hyperaspine
Ma, Dawei,Zhu, Wei
, p. 8609 - 8612 (2003)
Condensation of protected δ-hydroxy-β-amino ester 7 with a β-keto ester provides vinylogous urethane 8, which is cyclized under the action of t-BuOK followed by decarboxylation to afford enone 12. Hydrogenation of 12 or its N,O-diprotected derivative 13 g