作者:Kouji Kuramochi、Kazunori Tsubaki
DOI:10.1021/np5010483
日期:2015.5.22
The synthesis of ustusoranes A, B, and E, pergillin, dihydropergillin, (+/-)-penicisochroman A, and (-)-brassicadiol, starting from optically active (R)-benzolactone, is described. The synthesis of ustusoranes A and E established the absolute configurations of these natural products. The synthesis of pergillin and ()-penicisochroman A led to the structural revision of aspergiones E and F. This study clearly indicates that (R)-benzolactone is a potential intermediate in the synthesis of natural benzofuranoids.