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464892-38-4

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464892-38-4 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 464892-38-4 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 4,6,4,8,9 and 2 respectively; the second part has 2 digits, 3 and 8 respectively.
Calculate Digit Verification of CAS Registry Number 464892-38:
(8*4)+(7*6)+(6*4)+(5*8)+(4*9)+(3*2)+(2*3)+(1*8)=194
194 % 10 = 4
So 464892-38-4 is a valid CAS Registry Number.

464892-38-4Relevant articles and documents

A facile synthesis of (6S,1′S)-(+)-hernandulcin and (6S,1′R)-(+)-epihernandulcin

Kim, Jung Hun,Lim, Hyun Jin,Cheon, Seung Hoon

, p. 7501 - 7507 (2007/10/03)

A facile total synthesis of (+)-hernandulcin (1) was accomplished from (-)-isopulegol in 6 steps with 15% overall yield. Epoxidation of (-)-isopulegol with m-chloroperbenzoic acid followed by opening of the epoxide 3a with prenyl Grignard afforded the tertiary alcohol 4a with correct C-6 and C-1′ stereochemistry as a major product. Oxidation of the secondary alcohol in compound 4a to the ketone 5a was accomplished in high yield by using TPAP and N-methylmorpholine N-oxide. Conversion of the ketone 5a to α,β -unsaturated ketone via organoselenium intermediate gave (+)-hernandulcin (1). This method was also successfully applied to the synthesis of (+)-epihernandulcin (2).

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