The Reactivity of Epoxides with Lithium 2,2,6,6-Tetramethylpiperidide in Combination with Organolithiums or Grignard Reagents
作者:David M. Hodgson、Matthew J. Fleming、Steven J. Stanway
DOI:10.1021/jo070291v
日期:2007.6.1
2-disubstituted epoxides in the presence of LTMP to generate alkenes in a completely regio- and highly stereoselective manner. Arylated alkenes, dienes, allylsilanes, and enynes are accessed using this procedure. The methodology is applied in the synthesis of the roller leaf moth pheromone, (3E,5Z)-dodecadienyl acetate. The corresponding reaction without LTMP has also been examined, and a study using deuterated
详细介绍了2,2,6,6-四甲基哌啶锂(LTMP)修饰的环氧化物还原烷基化的范围和局限性。在LTMP存在下,将各种有机锂添加到末端和2,2-二取代的环氧化物中,以完全区域选择性和高度立体选择性的方式生成烯烃。使用该程序可得到丙烯酸化的烯烃,二烯,烯丙基硅烷和烯炔。该方法是在辊叶蛾信息素的合成应用,(3 é,5 Ž)-dodecadienyl乙酸酯。还研究了没有LTMP的相应反应,使用氘代环氧化物的研究提供了对该机理的深入了解。在存在LTMP的情况下,格氏试剂也被证明可以直接从环氧化物生产E-烯烃。