The First Asymmetric Total Syntheses of (+)-Lycorine and (+)-1-Deoxylycorine
作者:Arthur G. Schultz、Mark A. Holoboski、Mark S. Smyth
DOI:10.1021/ja9606440
日期:1996.1.1
The firstasymmetrictotal syntheses of (+)-1-deoxylycorine (2a) and (+)-lycorine (2b), the unnatural enantiomer of lycorine (1), are described. Construction of lactam 12, a key intermediate in the synthesis of both 2a and 2b, began by Birch reduction-alkylation of the chiral benzamide 3 with 2-bromoethyl acetate followed by ester saponification to give the 6-(2-hydroxyethyl)-1-methoxy-1,4-cyclohexadiene