作者:Paul A. Grieco、Kenneth J. Henry、Joseph J. Nunes、James E. Matt
DOI:10.1039/c39920000368
日期:——
The total synthesis of sesbanimide A (1) and B (2) is reported which features (a) the reaction of cyclopentadiene with glyoxylic acid leading to the useful bicyclic lactone building block 3 and (b) the use of 2.5 mol dm–3 lithium perchlorate in diethyl ether to promote the conjugate addition of 1-methoxy-1-(tert-butyldimethylsiloxy)ethene to unsaturated lactone 11.
Stereospecific synthesis of (+)- and (-)-sesbanimide A
作者:Martin J. Wanner、Nico P. Willard、Gerrit-Jan Koomen、Upendra K. Pandit
DOI:10.1016/s0040-4020(01)81662-8
日期:——
Starting from L-xylose and D-xylose derivatives, (-)-sesbanimide A and (+)-sesbanimide A, respectively, have been synthesized. The carbohydrate templates constitute ring B of the alkaloid on which the remaining two rings are constructed in the sequence B → AB → ABC.