Synthesis and Reactivity of 1-Pyrroline-5-carboxylate Ester 1-Oxides
摘要:
Some C5 mono- and diester-substituted 1-pyrroline-1-oxides have been prepared via reductive cyclisation of the corresponding gamma-nitro carbonyl compounds. Ethyl 2-phenyl-1-pyrroline-1-oxide-5-carboxylate 5c was regioselectively alkylated at C5. Acylation of this molecule occurs exclusively on the nitrone oxygen and leads to C3 substituted pyrrolines as the result of a hetero-Cope rearrangement. (C) 2000 Elsevier Science Ltd. All rights reserved.
Synthesis and Radical Reactions of Isomeric Alkenyl Oxaziridines
作者:David Black、Gavin Edwards、Sean Laaman
DOI:10.1055/s-2006-942380
日期:2006.6
stereoselectivity are discussed. Reaction of the oxaziridines with iron(II) sulfate, tributyltinhydride, or copper(I)triphenylphosphine chloride tetramer gave products arising from deoxygenation in many cases; however the trans-isomers also gave products derived from cyclisation of the intermediate aminyl radicals onto the pendant alkenyl chains.
作者:David StC. Black、Gavin L. Edwards、Sean M. Laaman
DOI:10.1016/s0040-4039(98)01160-5
日期:1998.8
Some 6-oxa-1-azabicyclo[3.1.0]hexanes have been prepared by photoisomerisation of alkenyl nitrone esters and peracidoxidation of pyrrolines Their ring-opening reactions with iron(II) sulfate, tri-n-butyl tin hydride and copper(I)triphenylphosphine chloride in many cases afford the related pyrrolines, but some trans oxaziridines give products derived from the trapping of aminyl radicals by the pendant
Intramolecular cycloaddition of 5-alkenyl-1-pyrroline 1-oxide-5-carboxylic esters
作者:David StC. Black、Donald C. Craig、Gavin L. Edwards、Sean M. Laaman
DOI:10.1016/s0040-4039(98)01159-9
日期:1998.8
5-alkenyl-1-pyrroline-1-oxide-5-carboxylic esters have been prepared by alkylation of a related nitrone carboxylic ester. On thermal treatment, they undergo regioselective intramolecular 1,3-dipolar cycloaddition to give a range of cycloadducts, which can be hydrogenolysed to generate azabicyclic compounds and unusual cyclic amino esters.
Synthesis and Reactivity of 1-Pyrroline-5-carboxylate Ester 1-Oxides
作者:David StC. Black、Gavin L. Edwards、Richard H. Evans、Paul A. Keller、Sean M. Laaman
DOI:10.1016/s0040-4020(00)00094-6
日期:2000.3
Some C5 mono- and diester-substituted 1-pyrroline-1-oxides have been prepared via reductive cyclisation of the corresponding gamma-nitro carbonyl compounds. Ethyl 2-phenyl-1-pyrroline-1-oxide-5-carboxylate 5c was regioselectively alkylated at C5. Acylation of this molecule occurs exclusively on the nitrone oxygen and leads to C3 substituted pyrrolines as the result of a hetero-Cope rearrangement. (C) 2000 Elsevier Science Ltd. All rights reserved.
Versatile Synthesis and Reactivity of Tropanes and Related Azabicycloalkanes
作者:David StC. Black、Donald C. Craig、Gavin L. Edwards、Sean M. Laaman