Tandem Acylation-Cycloalkylation: A Novel Synthesis of Phenanthrenes
作者:M. M. V. Ramana、Prashant V. Potnis
DOI:10.1055/s-1996-4337
日期:1996.9
Cyclohexene-1-acetic acid (1) undergoes reactions with various aromatic substrates 2a-k in the presence of polyphosphoric acid (PPA) to give 1,2,3,4,4a,10a-hexahydrophenanthren-9(10H)-ones 3a-k by tandem acylation-cycloalkylation, which on dehydrogenation with Pd-C afforded the corresponding phenanthrenes 4a-k in high yields.
Tricyclic 1H-imidazole-5-carboxylic acid derivatives as herbicides
申请人:Janssen Pharmaceutica N.V.
公开号:US04927449A1
公开(公告)日:1990-05-22
Novel herbicidal tricyclic 1H-imidazole-5-carboxylic acid derivatives, compositions containing these compounds as active ingredients, and a method for controlling weeds, preferably selectively in crops of useful plants.
Three-component radical condensations involving benzoylmethyl radicals, alkenes, and diphenyl disulfide
作者:Glen A. Russell、Shekhar V. Kulkarni
DOI:10.1021/jo00062a008
日期:1993.5
Acyl-substituted methyl radicals (RCOCH2.; R = H, Me, Ph), generated by photolysis of RCOCH2-HgCl, add to alkenes, enol ethers, or vinyl sulfides to give adduct radicals that are readily trapped by PhSSPh to yield a three-component condensation product. The presence of an alkali metal carbonate is crucial in preventing side reactions resulting in the conversion of the mercurial to RCOCH3 by PhSH formed in the photolysis.
SATO, TADASHI;TAMURA, KUNIO, TETRAHEDRON LETT., 1984, 25, N 17, 1821-1824