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.
作者:Amit A. Kudale、David O. Miller、Louise N. Dawe、Graham J. Bodwell
DOI:10.1039/c1ob05867c
日期:——
A series of pentacyclic heterocyclic systems (15 examples, 69–89%) have been synthesized using intramolecular Povarov reactions involving 3-aminocoumarins and O-cinnamylsalicylaldehydes. The Povarov adducts are formed with high selectivity for the trans,trans relative stereochemistry in the newly-formed [6,6] fused ring system. One example of a Povarov adduct featuring a new [6,5] fused ring system is reported. In this case, cis,trans relative stereochemistry was preferred.
作者:Amit A. Kudale、Jamie Kendall、C. Chad Warford、Natasha D. Wilkins、Graham J. Bodwell
DOI:10.1016/j.tetlet.2007.05.088
日期:2007.7
A commonly encountered problem in the synthesis of 3-aminocoumarins is the formation of 3-hydroxycoumarins. A solution to this problem, which involves non-aqueous formation of the 3-aminocoumarin system, is described.