Isolated from the Jamaican cyanobacterium Lyngbya majuscula, the jamaicamides are unique, mixed polyketide-peptides reported to be sodium channel blockers. The polyketide moiety contains an (E)-chloroolefin, an undetermined methyl stereocenter (C9), and an (E)-olefin (C10-C11). Herein we report the stereo- and regioselective synthesis of the polyketide moiety of the jamaicamides via a Julia-Kocienski coupling as the key step. (C) 2015 Elsevier Ltd. All rights reserved.
Synthesis of the Polyketide (<i>E</i>)-Olefin of the Jamaicamides
polyketide-peptides that are known to be sodium channel blockers. The polyketide moiety contains an (E)-vinyl chloride, an undetermined methyl stereocenter (C9), and an (E)-olefin. Herein, we report the synthesis of the (E)-olefin moiety of the polyketide of the jamaicamides utilizing a Kocienski–Julia coupling. Supplemental materials are available for this article. Go to the publisher's online edition
Jamaicamide B was isolated from the cyanobacterium Moorea producens in Jamaica and shows neurotoxicity as a sodium channel blocker. This unique mixed peptide–polyketide structure contains a pyrrolinone ring, a β-methoxy enone, an (E)-olefin, an undetermined stereocenter at C9, an (E)-chloroolefin, and a terminal alkyne. We report herein the first totalsynthesis and structural confirmation of the marine
牙买加酰胺 B 是从牙买加产生的莫雷阿蓝藻中分离出来的,作为钠通道阻滞剂具有神经毒性。这种独特的混合肽-聚酮化合物结构包含吡咯啉酮环、β-甲氧基烯酮、( E )-烯烃、未确定的C9立构中心、( E )-氯代烯烃和末端炔烃。我们在此报道了海洋天然产物( 9S )-牙买加酰胺B的首次全合成和结构确认。