Cyclization of acetylenic derivatives of aromatic carboxylic acids
摘要:
The Cu(I)-catalyzed intramolecular cyclization of 1-phenylethynyl-and 1-hexyn-1-yl-anthraquinone-2-carboxylic acid is a 6-endo-dig-addition, whereas the reaction for 1-(3-phenoxypropyn-1-yl)anthraquinone-2-carboxylic acid proceeds in a directionally nonspecific way. It is shown that the cyclization of vicinal acetylenic derivatives of aromatic carboxylic acids leads to the formation of the more stable of the possible cyclic, structures.
Cyclization of acetylenic derivatives of aromatic carboxylic acids
摘要:
The Cu(I)-catalyzed intramolecular cyclization of 1-phenylethynyl-and 1-hexyn-1-yl-anthraquinone-2-carboxylic acid is a 6-endo-dig-addition, whereas the reaction for 1-(3-phenoxypropyn-1-yl)anthraquinone-2-carboxylic acid proceeds in a directionally nonspecific way. It is shown that the cyclization of vicinal acetylenic derivatives of aromatic carboxylic acids leads to the formation of the more stable of the possible cyclic, structures.
Reactions of methyl 1-acetylenyl-9,10-anthraquinone-2-carboxylates with hydrazine
作者:I. D. Ivanchikova、R. N. Myasnikova、M. S. Shvartsberg
DOI:10.1007/bf02494509
日期:1998.10
Methyl 1-acetylenyl-9,10-anthraquinone-2-carboxylates react with NH2NH2 in ethanol at 80°C to give commensurable amounts of substituted 7H-dibenzo[de,h]quinolin-7-ones and 3,4-dihydro-3-aminonaphtho[2,3-f]isoquinoline-4,7,12-triones. The main, route of the reaction apparently includes nucleophilic addition of the reagent to the triple bond of the ester followed by intramolecular cyclization of the