Synthesis of Quinolinone Alkaloids via Aryne Insertions into Unsymmetric Imides in Flow
作者:Johannes Schwan、Merlin Kleoff、Bence Hartmayer、Philipp Heretsch、Mathias Christmann
DOI:10.1021/acs.orglett.8b03392
日期:2018.12.7
A general strategy for the synthesis of 3,4-dioxygenated quinolin-2-one natural products is reported. The key step is a regioselective insertion of arynes into unsymmetric imides. When performed in continuous flow, the reaction proceeds within minutes, while lower yields and longer reaction times are observed in batch. The resulting N-acylated 2-aminobenzophenones were transformed to (±)-peniprequinolone
报道了合成3,4-二加氧喹啉-2-酮天然产物的一般策略。关键步骤是将芳烃选择性插入不对称酰亚胺中。当以连续流动进行时,反应在数分钟内进行,而分批观察到较低的产率和较长的反应时间。将所得的N-酰化的2-氨基二苯甲酮转化为(±)-戊醌喹诺酮,(±)-黄酮喹诺酮E和F,(±)-6-脱氧黄酮喹诺酮E,(±)-喹啉酮A和B以及(±)-苯醌喹诺酮C以1-3步进行。