Reaction of the lithium α-sulfinylcarbanion of chloromethyl phenyl sulfoxide with α,β-alkenyl carboxylic acid chlorides gave γ,δ-alkenyl α-chloro-β-keto sulfoxides in variable yields. The keto sulfoxides were also synthesized from α,β-alkenyl aldehydes in two steps in good overall yields: addition of the lithium α-sulfinylcarbanion of chloromethyl phenyl sulfoxide to α,β-alkenyl aldehydes followed
Rhodium-Catalyzed Highly Enantio- and Diastereoselective Alkenylation of β,γ-Unsaturated Butenolides via Dynamic Kinetic Resolution
作者:Xiaosa Lu、Jie Zhu、Yinhua Huang
DOI:10.1021/acs.orglett.2c03551
日期:2022.12.9
diene ligand, (S,S)-Ph-bod, enables the facile synthesis of chiral butyrolactones in high yields with extremely high enantioselectivities (>99% ee in all cases) and high diastereoselectivities (up to >20:1 dr). The key process of the reaction involves the isomerization of β,γ-unsaturated butenolides to racemic α,β-unsaturated butenolides and the subsequent dynamic kinetic resolution through ligand-controlled
报道了一种铑催化的 β,γ-不饱和丁烯酸内酯的高度对映和非对映选择性烯基化反应。使用手性二烯配体 ( S , S )-Ph-bod,能够以高产率轻松合成手性丁内酯,具有极高的对映选择性(在所有情况下 >99% ee)和高非对映选择性(高达 >20: 1 博士)。反应的关键过程包括 β,γ-不饱和丁烯酸内酯异构化为外消旋 α,β-不饱和丁烯酸内酯,以及随后通过配体控制的动态动力学拆分,通过 1,4 原位生成的烯基铑物质进行对映选择性烯基化- 铑迁移。
Jones et al., Journal of the Chemical Society, 1957, p. 4628,4631
作者:Jones et al.
DOI:——
日期:——
929. Researches on acetylenic compounds. Part LIII. The relative strengths of some unsaturated carboxylic acids
作者:G. H. Mansfield、M. C. Whiting
DOI:10.1039/jr9560004761
日期:——
RAMASWAMY SOWMIANARAYANAN; HUI R. A. H. F.; JONES J. B., J. CHEM. SOC., CHEM. COMMUN.,(1986) N 20, 1545-1546
作者:RAMASWAMY SOWMIANARAYANAN、 HUI R. A. H. F.、 JONES J. B.