Metal‐Free, DBU‐Mediated, Microwave‐Assisted Synthesis of Benzo[
<i>c</i>
]xanthones by Tandem Reactions of Alkynyl‐1,3‐diketones
作者:Yi‐En Liang、Balaji D. Barve、Yao‐Haur Kuo、Hsu‐Wei Fang、Ting‐Shen Kuo、Wen‐Tai Li
DOI:10.1002/adsc.202001169
日期:2021.1.19
base‐mediated, green, microwave‐assisted efficient preparation of a diverse benzoxanthone library from variety of readily accessible γ‐alkynyl 1,3‐diketones is reported. The synthesis is based on tandem reactions involving intramolecular cyclization, propargyl‐allenyl isomerization, and electrocyclization in one pot. Some of the benzoxanthones are also synthesized by the one‐pot reaction of 1,3‐diketone and
据报道,可以通过碱介导的,绿色的,微波辅助的方法,从各种容易获得的γ-炔基1,3-二酮中高效制备各种苯并蒽酮文库。该合成基于串联反应,涉及一分子内的分子内环化,炔丙基-烯丙基异构化和电环化。在碱性加热条件下,1,3-二酮与炔基溴的一锅反应也合成了一些苯并氧杂蒽。这种转变还导致一个新的C-C键和一个新的C-O键的构建。