Highly diastereoselective additions of methoxyallene and acetylenes to chiral α-keto amides
作者:So Won Youn、Yong Hae Kim、Jeong-Wook Hwang、Youngkyu Do
DOI:10.1039/b100355k
日期:——
α-Keto amides bearing (S)-indoline chiral
auxiliaries reacted with lithiated methoxyallene or lithium acetylides to
produce the corresponding dihydrofuranones 7 through formation of the
tertiary α-hydroxy allenes, or tertiary α-hydroxy acetylenes,
respectively, at â78 °C with high diastereoselectivities (up to
>99% de).
带有(S)-吲哚啉手性基团的β-酮酰胺类辅助试剂与锂化甲氧基烯炔或乙炔锂反应,通过在â78°C下分别形成叔-γ-羟基烯丙炔或叔-γ-羟基乙炔,以高立体选择性(高达99%以上)来生产相应的二氢呋喃酮7。