Reactivity of 2-halo-2H-azirines. Part 3: Dehalogenation of 2-halo-2H-azirine-2-carboxylates
摘要:
The dehalogenation of 2-halo-3-phenyl-2H-azirine-2-carboxylates is described. Using sodium borohydride and tributyltin hydride 3-phenyl-2H-azirine-2-carboxylates were obtained in moderate yields. The synthesis of a new 2-bromo-2H-azirines with a chiral auxiliary, 10-phenylsulfonylisobornyl 2-bromo-3-phenyl-2H-azirine-2-carboxylate, is reported. Its dehalogenation led to 10-phenylsulfonylisobomyl 2H-azirine-2-carboxylate as single stereoisomer together with the formation of 10-phenylsulfonylisobomyl acetate. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of 2-halo-2H-azirines from phosphorus ylides
作者:Teresa M.V.D. Pinho e Melo、António M.d'A. Rocha Gonsalves、Cláudia S.J. Lopes、Thomas L. Gilchrist
DOI:10.1016/s0040-4039(98)02413-7
日期:1999.1
α-Oxophosphonium ylides (3a–3e) react with N-chlorosuccinimide and N-bromosuccinimide in the presence of azidotrimethylsilane giving the corresponding haloazidoalkenes (4a–4g) with elimination of triphenylphosphine oxide. These compounds were completely converted to the 2H-azirines 5a–5g on heating in heptane.
Reactivity of 2-halo-2H-azirines. Part 3: Dehalogenation of 2-halo-2H-azirine-2-carboxylates
作者:Teresa M.V.D Pinho e Melo、Ana L Cardoso、António M.d'A Rocha Gonsalves
DOI:10.1016/s0040-4020(03)00248-5
日期:2003.3
The dehalogenation of 2-halo-3-phenyl-2H-azirine-2-carboxylates is described. Using sodium borohydride and tributyltin hydride 3-phenyl-2H-azirine-2-carboxylates were obtained in moderate yields. The synthesis of a new 2-bromo-2H-azirines with a chiral auxiliary, 10-phenylsulfonylisobornyl 2-bromo-3-phenyl-2H-azirine-2-carboxylate, is reported. Its dehalogenation led to 10-phenylsulfonylisobomyl 2H-azirine-2-carboxylate as single stereoisomer together with the formation of 10-phenylsulfonylisobomyl acetate. (C) 2003 Elsevier Science Ltd. All rights reserved.
Synthesis of 2-halo-2H-azirines
作者:Teresa M.V.D Pinho e Melo、Cláudia S.J Lopes、Ana L Cardoso、António M.d'A Rocha Gonsalves