The first access to dissymmetric 2,4-di(het)aryl-pyrido[3,2-d]pyrimidines III is reported. Two mild alternative routes led to the rarely targeted compounds from 2,4-dichloro- and 2-chloro-4-isopropylsulfanyl-pyrido[3,2-d]pyrimidine by two successive palladium-catalyzed reactions involving an original regioselective chlorine discrimination. Alternatively, type III compounds were elaborated from 2 by
An efficient synthesis of 2-(2-pyridyl)indoles by palladium(0)-catalyzed heteroarylation
作者:Mercedes Amat、Sabine Hadida、Joan Bosch
DOI:10.1016/s0040-4039(00)74069-x
日期:1993.7
A general method for the preparation of 2-(2-pyridyl)indoles based on the palladium(0)-catalyzed coupling of 1-(benzenesulfonyl)-2-indolylzinc chloride with 2-halopyridines is reported.
The reaction of XeF2 with trialkylvinylstannanes: Scope and some mechanistic observations
作者:Marcus A. Tius、Joel K. Kawakami
DOI:10.1016/0040-4020(95)00141-t
日期:1995.4
difluoride in the presence of silver(I) triflate results in a very rapid process leading to the corresponding vinyl fluoride. The reaction is regio- and stereospecific and does not require stoichiometric Ag(I). No evidence could be obtained of radical intermediates on the reaction pathway leading to the vinyl fluorides. A symmetrical dimer derived from the vinylstannane, which was obtained as a reaction byproduct
Nucleophilic addition reactions of 2-nitro-1-(phenylsulfonyl)indole. A new synthesis of 3-substituted-2-nitroindoles
作者:Erin T. Pelkey、Timothy C. Barden、Gordon W. Gribble
DOI:10.1016/s0040-4039(99)01557-9
日期:1999.10
2-Nitro-1-(phenylsulfonyl)indole (1) undergoes nucleophilic addition reactions with the enolates of diethyl malonate and cyclohexanone, lithium dimethylcuprate, and indoleanion to afford the corresponding 3-substituted-2-nitroindoles (4–6, 8, 9) in low to high yields. Reaction of 1-(phenylsulfonyl)-2-(trialkylstannyl)indoles 13 and 14 with tetranitromethane affords the novel isoxazolo[5,4-b]indole 15 via a 1,3-dipolar
2-硝基-1-(苯基磺酰基)吲哚(1)与丙二酸二乙酯和环己酮的烯醇化物,二甲基cup酸锂和吲哚阴离子进行亲核加成反应,得到相应的3-取代的-2-硝基吲哚(4-6、8, 9)从低到高的产量。1-(苯基磺酰基)-2-(三烷基锡烷基)吲哚13和14与四硝基甲烷的反应通过1,3-偶极环加成反应与原位生成的硝基甲腈氧化物(19)得到新型异恶唑并[5,4- b ]吲哚15)。