A general and efficient synthesis of 5,6-dihydrodibenzo[b,h][1,6]naphthyridine derivatives
作者:Jeremy C. Dobrowolski、Alice Katen、Benjamin H. Fraser、Mohan Bhadbhade、David StC. Black、Naresh Kumar
DOI:10.1016/j.tetlet.2016.10.067
日期:2016.12
A two-step procedure for the synthesis of dihydrodibenzonaphthyridine derivatives from benzaldehydes and 2-aminoacetophenones, proceeding through a substituted dihydroquinolone intermediate, is described. The synthetic protocol allows for a versatile and robust coupling method between a range of 2-aminoacetophenones or 2-aminobenzophenones and a selection of substituted dihydroquinolones.
An efficient oxidation of 2-aryl-1,2,3,4-tetrahydro-4-quinolones employing ferric chloride hexahydrate–methanol: synthesis of naturally occurring 4-alkoxy-2-arylquinolines
作者:K. Hemanth Kumar、D. Muralidharan、P.T. Perumal
DOI:10.1016/j.tetlet.2004.08.144
日期:2004.10
A simple, inexpensive and efficient oxidation of 2-aryl-1,2,3,4-tetrahydro-4-quinolones has been carried out by employing FeCl3-6H(2)O-methanol under mild conditions. This method has been investigated for the synthesis of an endothelin receptor antagonist, benzofuro[3,2-b]pyridine core structure. (C) 2004 Elsevier Ltd. All rights reserved.