cepaciamide B 生成 (2S,11Z)-2-hydroxy-11-octadecenoate
参考文献:
名称:
Study on fungitoxic 3-amino-2-piperidinone-containing lipids: Revised structure of cepaciamide A and structural determination of its closely related lipid, cepaciamide B
摘要:
The structure of cepaciamide A was revised to be (3R,3'S,2"S,11"S,12"R)-3-[3'-(2"-hydroxy-11", 12"-methyleneoctadecanoyloxy)hexadecamido]-2-piperidinone with respect to the absolute configuration of the C-3'- and C-2"-positions and the position of the cyclopropane ring by using synthetic methods. The structure of cepaciamide B was also determined to be (3R,3'S,2"S,11"Z)-3-[3'-(2"-hydroxy-11"-octadecenoyloxy)hexadecamido]-2-piperidinone. (C) 1999 Elsevier Science Ltd. All rights reserved.
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. Esterification
Study on fungitoxic 3-amino-2-piperidinone-containing lipids: Revised structure of cepaciamide A and structural determination of its closely related lipid, cepaciamide B
The structure of cepaciamide A was revised to be (3R,3'S,2"S,11"S,12"R)-3-[3'-(2"-hydroxy-11", 12"-methyleneoctadecanoyloxy)hexadecamido]-2-piperidinone with respect to the absolute configuration of the C-3'- and C-2"-positions and the position of the cyclopropane ring by using synthetic methods. The structure of cepaciamide B was also determined to be (3R,3'S,2"S,11"Z)-3-[3'-(2"-hydroxy-11"-octadecenoyloxy)hexadecamido]-2-piperidinone. (C) 1999 Elsevier Science Ltd. All rights reserved.
Total syntheses of cepaciamides A and B, novel fungitoxic 3-amino-2-piperidinone-containing lipids produced by Pseudomonas cepacia D-202
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.