Use of formic or oxalic acid for the regioselective hydrocarboxylation of alkenes and alkynes catalyzed by palladium/carbon and 1,4-bis(diphenylphosphino)butane
作者:Guillermo S. Cortez、Reginald L. Tennyson、Daniel Romo
DOI:10.1021/ja016134+
日期:2001.8.1
Asymmetric Synthesis of Bicyclic β-Lactones via the Intramolecular, Nucleophile-Catalyzed Aldol Lactonization: Improved Efficiency and Expanded Scope
作者:Seong Ho Oh、Guillermo S. Cortez、Daniel Romo
DOI:10.1021/jo050024u
日期:2005.4.1
The intramolecular, nucleophile-catalyzed, aldol lactonization (NCAL) process merges catalytic, asymmetric carbocycle synthesis with β-lactone synthesis. The application of modified Mukaiyama reagents to this process led to greatly improved conversion and efficiency (70−82% yield) and shorter reaction times with no diminution of enantioselectivity (91−98% ee). The process was extended to several new