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221677-66-3

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221677-66-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 221677-66-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,2,1,6,7 and 7 respectively; the second part has 2 digits, 6 and 6 respectively.
Calculate Digit Verification of CAS Registry Number 221677-66:
(8*2)+(7*2)+(6*1)+(5*6)+(4*7)+(3*7)+(2*6)+(1*6)=133
133 % 10 = 3
So 221677-66-3 is a valid CAS Registry Number.

221677-66-3Downstream Products

221677-66-3Relevant articles and documents

Study on fungitoxic 3-amino-2-piperidinone-containing lipids: Total syntheses of cepaciamides A and B

Toshima, Hiroaki,Maru, Kazuko,Saito, Masatoshi,Ichihara, Akitami

, p. 939 - 942 (2007/10/03)

Total syntheses of cepaciamides A and B were accomplished. In the preparation of two fatty acid segments, (S)-malic acid was used as a chiral source to introduce (2S)-configuration. A known chiral cyclopropane derivative was introduced in the segment of cepaciamide A. The formation of (Z)-olefin in the segment of cepaciamide B was achieved by means of partial reduction of the acetylenic bond. Estexification between fatty acid segments and amide segment with DCC/DMAP and subsequent oxidative deprotection of the MPM group with CAN gave cepaciamides.

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