Metallation and functionalization of N-vinylpyrrole
作者:A. G. Mal'Kina、O. A. Tarasova、B. A. Trofimov、H. D. Verkruijsse、A. C. H. T. M. van der Kerk、L. Brandsma
DOI:10.1002/recl.19951140105
日期:——
Metallation of N-vinylpyrrole under presumed kinetic conditions, using n-butyllithium in THF/hexane mixtures, n-butyllithium/N,N,N′,N′-tetramethylethanediamine in hexane, or n-butyllithium/potassium tert-butoxide (1:1 molar ratio) in THF/hexane mixtures gives almost equal amounts of derivatives metallated at the α-vinyl or 2-pyrrole position. In the presence of 7–10 mol% diisopropylamine the α-vinyl-lithiated
Dipolar cycloaddition of cyclic rhodium carbenoids to digonal carbon. Synthesis of isoeuparin
作者:Michael C. Pirrung、Jiancun Zhang、Andrew T. Morehead
DOI:10.1016/s0040-4039(00)73398-3
日期:1994.8
Diazocyclohexanediones undergo dipolar cycloadditions with substituted acetylenes to provide 2-substituted tetrahydrobenzofuran-4-ones and with allenes to provide 2(H)-3-methylenedihydrofuranones.
An Improved Procedure for<i>N</i>-Ethynylpyrrole
作者:L. Brandsma、A. G. Mal'kina、B. A. Trofimov
DOI:10.1080/00397919408010587
日期:1994.10
N-Ethynylpyrrole can be obtained in good overall yields by reacting pyrrole with potassium tert-butoxide and trichloroethene in tetrahydrofuran, and subsequently dechlorinating the adduct with methyllithium or n-butyllithium in diethyl ether.
Trofimov, B.A.; Tarasova, O.A.; Brandsma, L., Russian Journal of Organic Chemistry, 1994, vol. 30, # 2, p. 335
作者:Trofimov, B.A.、Tarasova, O.A.、Brandsma, L.
DOI:——
日期:——
Trofimow B. A., Tarasowa O. A., Brandsma L., Zh. organ. khimii, 30 (1994) N 2, S 314