Correction of a Reported Xanthone Synthesis: The Preparation of a Benzo[<i>c</i>]coumarin
作者:Michael H. Benn、Masood Parvez、Nigel B. Perry、Arvi Rauk、John W. van Klink
DOI:10.1002/hlca.200900289
日期:2010.3
Reinvestigation of a reported synthesis of 5,8‐dihydroxy‐1,3‐dimethoxyxanthone from the reaction of 3,5‐dimethoxyphenol with 2‐(methoxycarbonyl)‐1,4‐benzoquinone resulted in the identification of the product as the isomer of benzo[c]coumarin, i.e., 7,10‐dihydroxy‐1,3‐dimethoxy‐6H‐dibenzo[b,d]pyran‐6‐one, established by X‐ray crystallography. This requires the revision of the structures of the derivatives
对3,5-二甲氧基苯酚与2-(甲氧基羰基)-1,4-苯醌的反应进行的5,8-二羟基-1,3-二甲氧基黄酮合成报道的重新研究导致产物被鉴定为苯并异构体[ c ]香豆素,即通过X射线晶体学确定的7,10-二羟基-1,3-二甲氧基-6 H-二苯并[ b,d ]吡喃-6-1。这就要求修改已报道的衍生物的结构。