Synthesis of substituted disulfonyl-containing polycyclic azines with the bridgehead nitrogen atom. Effects of the structure of 3-substituted pyridinium ylides on the regioselectivity of their reactions with E-1,2-di(alkylsulfonyl)-1,2-dichloroethenes
作者:N. E. Dontsova、A. M. Shestopalov
DOI:10.1007/s11172-017-1851-3
日期:2017.6
Heating the substituted pyridinium and isoquinolinium salts with E-1,2-di(alkylsulfonyl)-1,2-dichloroethenes in either chloroform or acetone in the presence of three-fold excess of Et3N gave high yields of substituted 1,2-di(alkylsulfonyl)indolizines and 1,2-di(alkylsulfonyl) pyrrolo[2,1-a]isoquinolines, respectively. Effects of the structure of 3-substituted pyridiniumylides on the regioselectivity
Regioselectivity in the reaction of azinium salts and ylides with tetracyanoethylene
作者:A. M. Shestopalov、I. A. Aitov、Yu. A. Sharanin、V. P. Litvinov
DOI:10.1007/bf00961312
日期:1991.6
The reactions of pyridinium, picolinium, and quinolinium salts and ylides with tetracyanoethylene have been found to be regioselective. Reaction of azinium salts with tetracyanoethylene in aqueous methanol affords azinium tricyanoethylenolates, but pyridinium ylides react differently, with the highly stereoselective formation of the Z-isomers of 3-aroyl-3-(R-1-pyridinio)-1,1,2-tricyano-2-propen-1-ides, which are 1,4-ylides with maximum charge separation.
Forster, William; Laird, Robert M., Journal of the Chemical Society. Perkin transactions II, 1991, # 7, p. 1033 - 1044
作者:Forster, William、Laird, Robert M.
DOI:——
日期:——
SHESTOPALOV, A. M.;AITOV, I. A.;SHARANIN, YU. A.;LITVINOV, V. P., IZV. AN CCCP. CEP. XIM.,(1991) N, S. 1431-1439
作者:SHESTOPALOV, A. M.、AITOV, I. A.、SHARANIN, YU. A.、LITVINOV, V. P.