Synthesis of Chromeno[3,4‐
<i>b</i>
]pyrrol‐4(3
<i>H</i>
)‐ones through the Domino Cyclization of 3‐Aminocoumarins with Arylglyoxal Monohydrates
作者:Xiaofeng Yang、Zhiwei Chen、Weihui Zhong
DOI:10.1002/ejoc.201700054
日期:2017.4.26
A domino cyclization reaction was developed for the synthesis of two libraries of chromeno[3,4‐b]pyrrol‐4(3H)‐one derivatives by employing 3‐aminocoumarins and arylglyoxal monohydrates in the presence of para‐toluenesulfonic acid (p‐TSA) as a promoter. Toluene and ethanol served important roles in the selective formation of these derivatives characterized by their different substitution patterns.
Tetrahydropyrido[2,3-c]coumarin derivatives were synthesized by intramolecular radical cyclization and Heck coupling. This method allowed the synthesis of the backbone of the Santiagonamine alkaloid.