[2,3]Wittig Rearrangements of “Lithium Enolates” Generated from α-Allyloxy Esters, Ketones, and Oximes. Some Implications of the Enolate Structures
作者:Osamu Takahashi、Takahiro Saka、Koichi Mikami、Takeshi Nakai
DOI:10.1246/cl.1986.1599
日期:1986.9.5
The lithium ester and ketone enolates (generated in HMPA-THF) and the dilithiated oxime (generated in THF) are shown to serve well as the migrating terminus for the [2,3]Wittig shift, not for the [3,3]Claisen shift. On the basis of these observations, the solution structures of the “lithium enolates” are discussed.
锂酯和酮烯醇化物(在 HMPA-THF 中生成)和二锂化肟(在 THF 中生成)被证明可以很好地作为 [2,3] Wittig 位移的迁移终点,而不是 [3,3] Claisen转移。在这些观察的基础上,讨论了“锂烯醇化物”的溶液结构。