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161156-09-8

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161156-09-8 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 161156-09-8 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,6,1,1,5 and 6 respectively; the second part has 2 digits, 0 and 9 respectively.
Calculate Digit Verification of CAS Registry Number 161156-09:
(8*1)+(7*6)+(6*1)+(5*1)+(4*5)+(3*6)+(2*0)+(1*9)=108
108 % 10 = 8
So 161156-09-8 is a valid CAS Registry Number.

161156-09-8Relevant articles and documents

A biomimetic approach to the discorhabdin alkaloids: Total syntheses of discorhabdins C and E and dethiadiscorhabdin D

Aubart, Kelly Marshall,Heathcock, Clayton H.

, p. 16 - 22 (2007/10/03)

The characteristic spirodienone structure of the discorhabdin alkaloids is readily formed by reaction of the tyramine-substituted indoloquinonimines 26, 35, and 36 with cupric chloride, triethylamine, and oxygen. This cyclization provides a possibly biomimetic route to discorhabdins C and E (41 and 42). The unbrominated spirodienone 40 reacts with hydrogen over Pd/C to give enone 46. Bromination at the α position gives a mixture of bromoenones that undergo smooth conversion to dethiadiscorhabdin D (4) upon treatment with basic alumina.

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