Total syntheses of (+)-adunctins C and D: assignment of their absolute configurations
作者:Jian Xiao、Jun Zhao、Ya-Wen Wang、Gan Luo、Yu Peng
DOI:10.1039/d1ob02055b
日期:——
The first totalsynthesis of (+)-adunctin C (ent-1) and (+)-adunctin D (2), two monoterpene-substitued dihydrochalcones isolated from Piper aduncum (Piperaceae), was achieved. A regioselective oxidative [3 + 2] cycloaddition of acylphloroglucinol with (−)-β-phellandrene was developed to construct their unique spirobenzofuran skeleton. The absolute configurations of natural adunctins 1 and 2 were thus
(+)-adunctin C ( ent - 1 ) 和 (+)-adunctin D ( 2 ) 是从Piper aduncum (Piperaceae) 中分离出来的两种单萜取代的二氢查尔酮,首次实现了全合成。开发了酰基间苯三酚与 (-)-β-水芹烯的区域选择性氧化 [3 + 2] 环加成,以构建其独特的螺苯并呋喃骨架。因此,通过这些努力分配了天然 adunctins 1和2的绝对构型。