Carbenes and the oxygen-hydrogen bond: 3-cyclopentenylidene. A novel approach to bis(homocyclopropenyl) cations
作者:Wolfgang Kirmse、Pham Van Chiem、Paul G. Henning
DOI:10.1021/ja00344a070
日期:1983.3
Efficient synthesis of substituted benzenes from 1,3-dienes or 1,4-cyclohexadienes with KMnO4 under mild conditions
作者:Christopher M. McBride、Will Chrisman、Clifford E. Harris、Bakthan Singaram
DOI:10.1016/s0040-4039(98)80015-4
日期:1999.1
Potassium permanganate absorbed on alumina is used to oxidize 1,4-cyclohexadienes to the corresponding aromatic compounds. Intermolecular Diels-Alder reactions followed by dehydrogenation of the products with potassium permanganate supported on alumina gives an efficient two step synthesis of highly substituted aromatic compounds from acyclic precursors. (C) 1998 Elsevier Science Ltd. All rights reserved.
KIRMSE, W.;VAN, CHIEM, PHAM;HENNING, P. -G., TETRAHEDRON, 1985, 41, N 8, 1441-1451
作者:KIRMSE, W.、VAN, CHIEM, PHAM、HENNING, P. -G.
DOI:——
日期:——
The diazo route to 2-vinylcyclopropylidenes
作者:Wolfgang Kirmse、Pham van Chiem、Paul-Georg Henning
DOI:10.1016/s0040-4020(01)96385-9
日期:1985.1
opylidenes (95,97) were generated from the corresponding nitrosoureas in methanol at room temperature. The diazo route is initiated by the formation of 2-vinylcyclopropanediazonium ions (e.g.43) which do not undergo 1,3-carbon shifts. No cyclopentenyl products were found in weakly basic methanol where the diazonium ions prevail. Ring opening of the diazonium ions gives pentadienyl cations and products