Stereoselective synthesis of disubstituted 3(2H)-furanones via catalytic intramolecular C-H insertion reactions of α-diazo-β-keto esters including asymmetric induction
作者:Tao Ye、M.Anthony McKervey、Bridget D. Brandes、Michael P. Doyle
DOI:10.1016/0040-4039(94)85379-7
日期:1994.9
Rhodium(II) catalysed decomposition of γ-alkoxy-α-diazo-β-ketoesters produce cis-2,5-disubstituted -3(2H)-furanones with high ( > 97%) stereoselectivity. The combination of a chiral auxiliary in the ester moiety of the diazo precursor and a chiral catalyst can lead to asymmetric synthesis with diastereoselectivities up to 61% de.
铑(II)催化的γ-烷氧基-α-重氮-β-酮酸酯的分解产生具有高(> 97%)立体选择性的顺式-2,5-二取代-3(2H)-呋喃酮。重氮前体的酯部分中的手性助剂和手性催化剂的组合可导致不对称合成,其非对映选择性高达61%de。