The synthesis of 3,5-dioxoheptanedioic acid derivatives based on the reaction of ketene with malonyl chloride was developed. Resulting diketones were subjected to Ru–(S)-BINAP-catalyzed asymmetric hydrogenation. The products were transformed into enantiomericallypure 3,5-substituted-δ-valerolactones.
VAN, BAC NGUYEN;LANGLOIS, YVES, TETRAHEDRON LETT., 29,(1988) N 23, 2819-2822
作者:VAN, BAC NGUYEN、LANGLOIS, YVES
DOI:——
日期:——
New strategy in the stereocontrolled synthesis of the spiro ketal subunit of milbemycins
作者:Nguyen Van Bac、Yves Langlois
DOI:10.1016/0040-4039(88)85219-5
日期:1988.1
A double Baeyer-Villiger oxidation of bicyclo[2,2,1] heptane-2,5-dione and a stereocontrolled alkylation of the dianion derived from 4-pentyn-2-ol are the salient features of a newstrategy in the stereocontrolled synthesis of the spiroketal moiety of milbemycins.