Synthesis of α-arylnaphthalenes from diphenylacetaldehydes and 1,1-diphenylacetones
摘要:
Condensation of diphenylacetalclehydes and 1,1-diphenylacetones with malonodinitrile and cyclization of obtained aryl-ylidenemalonodinitriles in concentrated sulfuric acid leads to 1-amino-4-arylnaphthalene-2-carbonitriles. The benzannulation reaction is accompanied by a quasi-aromatic rearrangement. Preliminary tests of some synthesized aminonitriles have revealed their considerable biological activity against phytopathogenic fungi. (c) 2008 Elsevier Ltd. All rights reserved.
Novel synthesis of α-arylnaphthalenes from diphenylacetaldehydes and 1,1-diphenylacetones
作者:Bartłomiej Kozik、Jarosław Wilamowski、Maciej Góra、Janusz J. Sepioł
DOI:10.1016/j.tetlet.2006.03.054
日期:2006.5
A two-step synthesis of 1-amino-4-arylnaphthalene-2-carbonitriles from diphenylacetaldehydes and 1,1-diphenylacetones involves condensation of the carbonyl compounds with malonodinitrile and cyclization of the aryl-ylidenemalonodinitriles obtained in concentrated sulfuric acid. The benzannulation reaction is accompanied with a quasi-aromatic rearrangement. Some of synthesized aminonitriles reveal considerable biological activity against phytopathogenic fungi. (c) 2006 Elsevier Ltd. All rights reserved.
Synthesis of α-arylnaphthalenes from diphenylacetaldehydes and 1,1-diphenylacetones
作者:Bartłomiej Kozik、Jarosław Wilamowski、Maciej Góra、Janusz J. Sepioł
DOI:10.1016/j.tet.2008.04.067
日期:2008.6
Condensation of diphenylacetalclehydes and 1,1-diphenylacetones with malonodinitrile and cyclization of obtained aryl-ylidenemalonodinitriles in concentrated sulfuric acid leads to 1-amino-4-arylnaphthalene-2-carbonitriles. The benzannulation reaction is accompanied by a quasi-aromatic rearrangement. Preliminary tests of some synthesized aminonitriles have revealed their considerable biological activity against phytopathogenic fungi. (c) 2008 Elsevier Ltd. All rights reserved.
Enantioselective Protonation of Radical Anion Intermediates in Photoallylation and Photoreduction Reactions of 3,3-Diaryl-1,1-dicyano-2-methylprop-1-ene with Allyltrimethylsilane
transfer pathways. When (S)-mandelic acid was used as the proton source, the reactions proceeded with 3.4 and 4.8 %ee for formation of 3 and 4, respectively. The results of studies of the effect of aryl ring substituents and several chiral carboxylic acids suggested that the enantioselectivities of the reactions are governed by steric controlled proton transfer in intermediate complexes formed by π-π and