Base-catalyzed intramolecular heterocyclization of o-alkynylbenzhydrazides
作者:T. F. Mikhailovskaya、S. F. Vasilevsky
DOI:10.1007/s11172-010-0133-0
日期:2010.3
The reaction of methyl o-(2-R-ethynyl)benzoates with hydrazine affords either fused 4-R-methylphthalazin-1-ones or 2-amino-3-R-methylideneisoindolin-1-ones. The latter are on treatment with KOH undergo recyclization into the corresponding 4-R-methylphthalazin-1-ones.
Study of the heterocyclization of<i>vic</i>-substituted hydrazides of acetylenylpyrazolecarboxylic acids into<i>N</i>-amino pyrazolopyridinones
作者:Sergei F. Vasilevsky、Elena V. Mshvidobadze、José Elguero
DOI:10.1002/jhet.5570390617
日期:2002.11
3-c]pyridin-4-ones 4 and N-amino pyrazolo[3,4-c]pyridin-4-ones 8 from vic-acetylenyl/hydrazido pyrazoles. The procedure involves the intermediate synthesis of methyl esters of acetylenyl-pyrazole carboxylic acids and the subsequent cyclization under a variety of conditions.
我们报告一个新的和有效的方法来制备ñ -氨基吡唑并[4,3- c ^ ]吡啶-4-酮4和ñ -氨基吡唑并[3,4- c ^ ]吡啶-4-酮8从VIC -acetylenyl /酰肼基吡唑类。该方法涉及乙炔基-吡唑羧酸的甲酯的中间合成和随后在多种条件下的环化。
Reactions of organocopper compounds with halogeno-olefins
作者:J. Burdon、P. L. Coe、C. R. Marsh、J. C. Tatlow
DOI:10.1039/c19670001259
日期:——
Stable nitroxyl radicals with triple bonds: 4-acetylenyl-3-imidazoline-3-oxide-1-oxyls
作者:Sergei F. Vasilevsky、Svetlana V. Klyatskaya、Olga L. Korovnikova、Svetlana A. Amitina、Dmitri V. Stass、Igor A. Grigor'ev、José Elguero
DOI:10.1016/j.tet.2006.02.036
日期:2006.5
Cross-coupling reaction of 1-hydroxy-2,2,5,5-tetramethyl-4-[2-(p-iodophenyl)vinyl]1-3-imidazoline-3-oxide with copper(l) salts of 1-aryl(hetaryl)alkynes leads to the corresponding 2,2,5,5-tetramethyl-4-[2-(p-aryl(hetaryl)ethynylphenyl)vinyl]-3-imidazoline-3-oxide-1-oxyls in high yields. (c) 2006 Elsevier Ltd. All rights reserved.
Cyclization of acetylenic derivatives of aromatic carboxylic acids
作者:I. D. Ivanchikova、G. �. Usubalieva、P. V. Schastnev、A. A. Moroz、M. S. Shvartsberg
DOI:10.1007/bf00863591
日期:1992.9
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.