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231299-15-3

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231299-15-3 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 231299-15-3 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 2,3,1,2,9 and 9 respectively; the second part has 2 digits, 1 and 5 respectively.
Calculate Digit Verification of CAS Registry Number 231299-15:
(8*2)+(7*3)+(6*1)+(5*2)+(4*9)+(3*9)+(2*1)+(1*5)=123
123 % 10 = 3
So 231299-15-3 is a valid CAS Registry Number.

231299-15-3Relevant articles and documents

Total syntheses of cepaciamides A and B, novel fungitoxic 3-amino-2- piperidinone-containing lipids produced by Pseudomonas cepacia D-202

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

, p. 5793 - 5808 (1999)

Total syntheses of cepaciamides A and B were accomplished. (R)-3-Amino- 2-piperidinone was obtained via cyclization of (R)-ornithine. The common amide-linked fatty acid was synthesized via Sharpless AD as the key step. Amide-formation was achieved with DEPC. In the preparation of two fatty acid segments, (S)-malic acid was used as the 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. Esterification between the fatty acid-segments and the amide-segment with DCC/DMAP and subsequent oxidative deprotection of the MPM group with CAN gave cepaciamides.

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