A simple and facile route for the synthesis of 2H-1,4-benzoxazin-3-(4H)-ones via reductive cyclization of 2-(2-nitrophenoxy)acetonitrile adducts in the presence of Fe/acetic acid
作者:Chintakunta Ramesh、B. Rama Raju、Veerababurao Kavala、Chun-Wei Kuo、Ching-Fa Yao
DOI:10.1016/j.tet.2010.11.095
日期:2011.2
A simple route for the synthesis of 1,4-benzoxazin-3-(4H)-ones is described herein. This method involves the reductive cyclization of 2-(2-nitrophenoxy)acetonitrile adducts in the presence of Fe/acetic acid in good to excellent yields. This system was compatible with various other functional groups.
in 1,4-dioxane is reported for the synthesis of biologically interesting benzoxazin-3(4H)-ones. It is believed that irradiation with a blue LED facilitates the reaction, serving as a source of energy. The SEAr reaction pathway is ascribed to the electronic effects present in the aryl ring of the substrates. The reaction is also applicable for the synthesis of useful scaffolds possessing a quinolin-2-one
据报道,在 1,4-二恶烷中使用 FeCl3 对 N-酰氧基酰胺进行光诱导分子内亲电芳香取代 (SEAr),用于合成具有生物学意义的苯并恶嗪-3(4H)-酮。据信,蓝色 LED 的照射会促进反应,从而充当能量来源。SEAr 反应途径归因于底物芳环中存在的电子效应。该反应还适用于合成具有喹啉-2-一核心的有用支架,例如抗癌试剂以及布西哌唑和西洛酰胺的类似物。
Synthesis of 3-Oxo-3,4-dihydro-2<i>H</i>-1,4-benzoxazines and -1,4-benzothiazines under Phase-Transfer Catalysis
作者:XIAN Huang、CHENG-CHU Chan
DOI:10.1055/s-1984-30993
日期:——
HUANG, XIAN;CHAN, CHENG-CHU, SYNTHESIS, BRD, 1984, N 10, 851-852