Acceleration effect of allylic hydroxy group on ring-closing enyne metathesis of terminal alkynes: scope and application to the synthesis of isofagomine
作者:Tatsushi Imahori、Hidetomo Ojima、Hiroki Tateyama、Yukiko Mihara、Hiroki Takahata
DOI:10.1016/j.tetlet.2007.11.098
日期:2008.1
substituent effect on ring-closing enyne metathesis has been found. An allylic hydroxy group on enyne substrates accelerates ring-closing enyne metathesis of terminal alkynes. The reaction proceeds smoothly without ethylene atmosphere and/or more reactive newer generation Ru-carbene catalysts, which are generally necessary to promote the reaction. This efficient reaction was applied to the synthesis of
已经发现了对闭环烯炔复分解的有趣的烯丙基取代基作用。烯炔底物上的烯丙基羟基可促进末端炔烃的闭环烯炔复分解。该反应在没有乙烯气氛和/或反应性更高的新一代Ru-卡宾催化剂的情况下顺利进行,而这通常是促进反应所必需的。将该有效反应应用于异黄酮的合成。