Iminium ion and acyliminium ion initiated cyclization reactions of vinylsilanes. Regiocontrolled synthesis of tetrahydropyridines and related heterocycles
作者:Chris Flann、Thomas C. Malone、Larry E. Overman
DOI:10.1021/ja00254a032
日期:1987.9
Enantioselective Synthesis of 15-<i>e</i><i>pi</i>-Haterumalide NA Methyl Ester and Revised Structure of Haterumalide NA
[structure: see text] The enantioselectivesynthesis of the enantiomer of the haterumalide NA methylester, a cytotoxic macrolide from an Okinawan sponge, was achieved from the threitol derivative in 26 steps. The key steps are the stereoselective construction of a chloroolefin unit and the intramolecular Reformatsky-type reaction. This synthesis revised the absolute stereochemistry of haterumalide