Enantiospecific and Regioselective Rhodium-Catalyzed Allylic Alkylation: Diastereoselective Approach to Quaternary Carbon Stereogenic Centers
作者:P. Andrew Evans、Lawrence J. Kennedy
DOI:10.1021/ol005953g
日期:2000.7.1
The enantiospecific and regioselective rhodium-catalyzed allylic alkylation of a series of chiral nonracemic allylic carbonates, followed by ozonolysis and reductive lactonization, provides a convenient route to optically active gamma-lactones. Sequential alkylation and reductive alkylation furnished the alpha-quaternary-beta-ternary substituted gamma-lactone derivative as a >/=10:1 mixture of diastereoisomers
一系列手性非外消旋烯丙基碳酸酯的对映体特异性和区域选择性铑催化的烯丙基烷基化,然后进行臭氧分解和还原性内酯化,为光学活性的γ-内酯提供了便利的途径。顺序烷基化和还原性烷基化提供了α-季-β-三元取代的γ-内酯衍生物,其为非对映异构体的> / = 10:1混合物。