A series of gamma-hydroxy amides were synthesized with high enantioselectivities (up to 99%) using asymmetric hydrogenation of the corresponding gamma-ketoamides in the presence of Ru-Xyl-SunPhos-Daipen catalyst providing key building blocks for a variety of naturally occurring and biologically active compounds.
Selvamurugan; Aidhen, Journal of Chemical Research - Part S, 2000, # 12, p. 590 - 592
作者:Selvamurugan、Aidhen
DOI:——
日期:——
A Catalytic Enantioselective Iodocyclization Route to Dihydrooxazines
The first catalytic enantioselectivesynthesis of 5,6-dihydro-4H-1,2-oxazines bearing an oxygen-containing quaternarystereogeniccenter has been developed through iodoetherification of γ,δ-unsaturated oximes. This operationally straightforward reaction is catalyzed by Cinchona alkaloids-based bifunctional tertiary aminothiourea derivatives and furnishes the products generally in good to excellent
通过γ,δ-不饱和肟的碘醚化,已经开发出了一个带有含氧季立体中心的5,6-二氢-4 H -1,2-恶嗪的第一催化对映选择性合成。该操作简单的反应被基于金鸡纳生物碱的双功能叔氨基硫脲衍生物催化,并通常以高至优异的收率和中等至高的对映选择性(高达97:3 er)提供产物。