Synthesis of Marine Polyacetylenes Callyberynes A−C by Transition-Metal-Catalyzed Cross-Coupling Reactions to sp Centers
摘要:
Efficient total syntheses of the sponge-derived hydrocarbon polyacetylenes callyberynes A-C have been achieved using metal-catalyzed cross-coupling reactions of highly unsaturated 1,3-diyne fragments as the key steps, namely: Cadiot-Chodkiewicz reaction under Alamis optimized conditions (sp-sp), sequential Sonogashira reaction of a cis,cis-divinyl dihalide (sp(2)-sp), and Kumada-Corriu reaction of an unactivated alkyl iodide (sp(3)-sp). This last approach constitutes the first application of a metalcatalyzed sp(3)-sp Kumada-Corriu cross-coupling reaction to the synthesis of a natural product.
Synthesis of Marine Polyacetylenes Callyberynes A−C by Transition-Metal-Catalyzed Cross-Coupling Reactions to sp Centers
摘要:
Efficient total syntheses of the sponge-derived hydrocarbon polyacetylenes callyberynes A-C have been achieved using metal-catalyzed cross-coupling reactions of highly unsaturated 1,3-diyne fragments as the key steps, namely: Cadiot-Chodkiewicz reaction under Alamis optimized conditions (sp-sp), sequential Sonogashira reaction of a cis,cis-divinyl dihalide (sp(2)-sp), and Kumada-Corriu reaction of an unactivated alkyl iodide (sp(3)-sp). This last approach constitutes the first application of a metalcatalyzed sp(3)-sp Kumada-Corriu cross-coupling reaction to the synthesis of a natural product.
作者:Benjamin W. Gung、Derek T. Craft、Jessica Truelove
DOI:10.1016/j.tetasy.2007.05.034
日期:2007.6
A short synthesis of the enantiomer of the polyacetylenic natural product siphonodiol is described. The synthesis is based on the strategy of taking advantage of the hidden symmetry of the target molecule and minimizing the use of protecting groups, thereby reducing the total number of steps and increasing the overall efficiency. (c) 2007 Elsevier Ltd. All rights reserved.
Synthesis of Marine Polyacetylenes Callyberynes A−C by Transition-Metal-Catalyzed Cross-Coupling Reactions to sp Centers
Efficient total syntheses of the sponge-derived hydrocarbon polyacetylenes callyberynes A-C have been achieved using metal-catalyzed cross-coupling reactions of highly unsaturated 1,3-diyne fragments as the key steps, namely: Cadiot-Chodkiewicz reaction under Alamis optimized conditions (sp-sp), sequential Sonogashira reaction of a cis,cis-divinyl dihalide (sp(2)-sp), and Kumada-Corriu reaction of an unactivated alkyl iodide (sp(3)-sp). This last approach constitutes the first application of a metalcatalyzed sp(3)-sp Kumada-Corriu cross-coupling reaction to the synthesis of a natural product.