A general and stereoselective synthesis of the capsaicinoids via the orthoester Claisen rearrangement
作者:Harumi Kaga、Kouhei Goto、Tomiki Takahashi、Masao Hino、Takashi Tokuhashi、Kazuhiko Orito
DOI:10.1016/0040-4020(96)00414-0
日期:1996.6
pungent principle of hot pepper, and its 15 analogs have been efficiently synthesized. The key step of this synthetic sheme is the orthoester Claisen rearrangement, which transformed allylic alcohols 2A-C to (E)-alkenoates 3A-C () in a highly stereoselective manner. The subsequent carbon chain elongations on 3 based on the cyanation or the malonic acid ester synthesis afforded (E)-alkenoic acids 8, which
辣椒素是辣椒的主要辛辣成分,它的15种类似物已得到有效合成。这种合成的sheme的关键步骤是原酸酯Claisen重排,它以高度立体选择性的方式将烯丙醇2A-C转变为(E)-链烯酸酯3A-C()。随后的基于氰化或丙二酸酯合成的碳链在3上的延伸得到(E)-链烯酸8,将其转化为相应的酰氯,然后与香草醛偶联以得到辣椒素。还对这些辣椒素进行了HPLC和CE(毛细管电泳)分析。