Bangdiwala; Desai, Journal of the Indian Chemical Society, 1954, vol. 31, p. 43,46
作者:Bangdiwala、Desai
DOI:——
日期:——
Production of 3- benzoyl-2,1-benzisoxazoles,2-phenyl-4H-3,1-benzoxazin-4-ones, and novel quinolinone derivatives from 2-phenylquinolin-4(1H)-ones and sodium dichloroisocyanurate
作者:Benjamin Staskun、Theodorus van Es
DOI:10.1039/p19930000511
日期:——
A simple synthesis of certain 3-benzoyl-2,1 -benzisoxazoles 6 is accomplished via treatment of the corresponding 2-phenylquinolin-4(1H)-one 1 with sodium dichloroisocyanurate 2 in methanolic aq. alkali; the isomeric 2-phenyl-4H-3,1-benzoxazin-4-one 7 is also a product. Under different conditions the same reactants furnish two new types of quinolinone derivative, viz. 3,3-dichloro-2-phenylquinolin-4(3H)-one 4 and 2-alkoxy-3,3-dichloro-2,3-dihydro-2-phenylquinolin-4(1H)-one 5, as chief products; the former is an intermediate in the synthesis of products 6 and 7. Some of the chemical properties of the dichloro compounds 4 and 5 are described. Mechanistic pathways and proposals to explain the results and observations are presented.
A new application of diphenylphosphorylazide (DPPA) reagent: convenient transformations of quinolin-4-one, pyridin-4-one and quinazolin-4-one derivatives into the 4-azido and 4-amino counterparts
Herein, we describe a transformation of the oxo-function of a series of quinolin/pyridin/quinazolin-4-ones into 4-azido and thence into 4-amino derivatives in moderate yields by a very short and convenient new procedure using DPPA (diphenylphosphoryl azide) as reagent. A mechanism for this interesting new application of DPPA is suggested based on the identification of some of the intermediates. (C) 2004 Elsevier Ltd. All rights reserved.
Staskun Baniamin, van Es Theodorus, J. Chem. Soc. Perkin Trans. 1, (1993) N 4, S 511- 516
作者:Staskun Baniamin, van Es Theodorus
DOI:——
日期:——
Staskun, Journal of the South African Chemical Institute, 1956, vol. 9, p. 89