Stereoselective Synthesis of Oxygenated Trisubstituted Olefins Using N-Ylides [2,3]Rearrangement
作者:Kiyoshi Honda、Daisuke Igarashi、Masatoshi Asami、Seiichi Inoue
DOI:10.1055/s-1998-1745
日期:1998.6
[2,3]Sigmatropic rearrangement of N-(ethoxycarbonyl)-methyl-β-methallylammonium ylide with an oxygen functionality at the β-position or γ-position forms trisubstituted trans-olefins with high stereoselectivity. On the other hand, the rearrangement of salts having a tiglyl ester moiety of a carbethoxy group affords cis-olefins. The present method was applied to the synthesis of plaunotol.
[2,3]N-(乙氧基羰基)-甲基-δ-烯丙基铵在δ-位或δ-³-位上具有氧官能团的西格玛托普重排反应可生成具有高度立体选择性的三取代反式烯烃。另一方面,具有碳乙氧基的惕甘酸酯分子的盐类的重排可生成顺式烯烃。本方法被应用于合成 plaunotol。