A high‐yielding protocol for the synthesis of 4,
<scp>5‐diarylpyrimidin</scp>
‐2‐amine derivatives from chalcones
作者:Krishnaraj Kooramatom Unni、Prasanth K. Menon、Scholly Clair George、Sajesh P. Thomas、K. S. Devaky
DOI:10.1002/jhet.4369
日期:2022.1
A novel, high yielding and versatile protocol was achieved for the synthesis of 4,5-diaryl-2-pyrimidinamine derivativesfrom chalcones. The synthesis was accomplished by converting the chalcones into 3-chloro-2,3-diaryl-2-propen-1-ones followed by subsequent reaction with amidine derivatives.
3-Aryl quinolines are readily synthesized by a novel Friedlander-type reaction with 3-oxo-2,3-diaryl-propionaldehydes and 2-amino arylaldehydes. A preliminary mechanism of this novel one pot, two-step synthesis has been explored with the proofs of isolation of the enaminone intermediate and the eliminated benzoic acid in this reaction. (C) 2011 Elsevier Ltd. All rights reserved.
Huettel,R. et al., Chemische Berichte, 1960, vol. 93, p. 1433 - 1446
作者:Huettel,R. et al.
DOI:——
日期:——
Synthesis of 2-hydroxy-5,6-diarylnicotinonitriles and 2-chloro-5,6-diarylnicotinonitriles from β-chloroenones
作者:K.U. Krishnaraj、K.S. Devaky
DOI:10.1016/j.tet.2014.07.031
日期:2014.9
Vilsmeier-Haack reaction of beta-ketoaldehydes leads to the formation of beta-chloroenones and these chloroenones on treatment with malononitrile afford 2-hydroxy-5,6-diarylnicotinonitriles. But a one-pot reaction of beta-ketoaldehydes with Vilsmeier-Haack reagent and malononitrile or cyanoacetamide results in the formation of 2-chloro-5,6-diarylnicotinonitriles in good yields. (C) 2014 Elsevier Ltd. All rights reserved.