A new route to functionalised π-allyltricarbonyliron lactam complexes from aziridines and their use in stereoselective synthesis and oxidative conversion to β-lactams
Preparation and Use of Aziridino Alcohols as Promoters for the Enantioselective Addition of Dialkylzinc Reagents to <i>N</i>-(Diphenylphosphinoyl) Imines
作者:Pher G. Andersson、David Guijarro、David Tanner
DOI:10.1021/jo970918h
日期:1997.10.1
chiral aziridino alcohols 2-5 has been synthesized starting from either readily available amino acids (L-serine, L-threonine, and allo-L-threonine) or simple olefins (using Sharpless asymmetric aminohydroxylation and dihydroxylation reactions). Chiral ligands 2-5 have been tested as promoters for the enantioselective addition of dialkylzinc reagents to N-(diphenylphosphinoyl) imines 1. The influence
作者:M.Teresa Barros、Christopher D. Maycock、M.Rita Ventura
DOI:10.1016/s0040-4039(02)00791-8
日期:2002.6
α-iodocycloenones in very good yield, by a Michael addition/cyclisation (Gabriel–Cromwell) process employing a slight excess of primaryamine and Cs2CO3 as base at 95°C. Using chiralamines it was possible to prepare optically pure aziridines. The same method was also efficient for the synthesis of aziridines from acyclic α-halounsaturated compounds. 2-Oxoazabicycles reacted with several nucleophiles to afford
通过迈克尔加成/环化(Gabriel-Cromwell)工艺,在95℃下使用略有过量的伯胺和Cs 2 CO 3作为碱,由α-碘代环烯酮以很高的收率制备了氮丙啶。使用手性胺可以制备光学纯的氮丙啶。同样的方法对于由无环α-卤代饱和化合物合成氮丙啶也是有效的。2-氧氮杂双环与几种亲核试剂反应以优异的产率提供了α-杂原子取代的环状烯酮。
Reaction of Vinyl Aziridines with Arynes: Synthesis of Benzazepines and Branched Allyl Fluorides
作者:Sherif J. Kaldas、Eva Kran、Christian Mück‐Lichtenfeld、Andrei K. Yudin、Armido Studer
DOI:10.1002/chem.201904727
日期:2020.2.3
on the reaction conditions and the choice of the aryne precursor, the aziridinium intermediate can be trapped through two distinct mechanistic pathways. The first one proceeds through a formal [5+2] cycloaddition to furnish valuable multi-substituted benzazepines. In the second pathway, the aziridinium is intercepted by a fluoride ion to afford allylic fluorides in good yields. Both reactions proceed
A new route to functionalised π-allyltricarbonyliron lactam complexes from aziridines and their use in stereoselective synthesis and oxidative conversion to β-lactams
作者:Steven V. Ley、Ben Middleton
DOI:10.1039/a806236f
日期:——
Aziridinyl enones can be converted in good yield into Ï-allyltricarbonyliron lactam complexes bearing ketone functionality in the side chain; addition of a variety of nucleophiles into the side chains of these complexes proceeds in good yield and excellent (>95%) de to afford secondary and tertiary alcohols which on treatment with trimethylamine N-oxide form the corresponding β-lactams in good yield.