Stereoselective Synthesis of Constrained Oxacyclic Hydroxyethylene Isosteres of Aspartic Protease Inhibitors: Aldol and Mukaiyama Aldol Methodologies for Branched Tetrahydrofuran 2-Carboxylic Acids
作者:Stephen Hanessian、Yihua Hou、Malken Bayrakdarian、Marina Tintelnot-Blomley
DOI:10.1021/jo050749y
日期:2005.8.1
The synthesis of diastereomeric 3-substituted-tetrahydrofuran 2-carboxylic acids in enantiopure form was achieved relying on aldol condensations of N-substituted α-amino aldehydes with enolates and enol silyl ethers of γ-butyrolactone. Catalytic YbFOD leads to a high yield of a syn/syn-α-amino alcohol isomer. This was used as a constrained THF subunit in the synthesis of a peptidomimetic intended as
依靠N-取代的α-氨基醛与烯醇盐和γ-丁内酯的烯醇甲硅烷基醚的醛醇缩合,以对映纯形式合成非对映异构体3-取代-四氢呋喃2-羧酸。催化YbFOD导致高产率的顺式/顺式-α-氨基醇异构体。它被用作拟肽酶BACE1抑制剂的拟肽合成中的受约束的THF亚基,BACE1酶与导致阿尔茨海默氏病斑块形成的一系列事件有关。