Unprecedented Nucleophilic Additions of Highly Polar Organometallic Compounds to Imines and Nitriles Using Water as a Non-Innocent Reaction Medium
作者:Giuseppe Dilauro、Marzia Dell'Aera、Paola Vitale、Vito Capriati、Filippo Maria Perna
DOI:10.1002/anie.201705412
日期:2017.8.14
inert atmospheres with dry volatile organic solvents and often low temperatures, the addition of highly polar organometallic compounds to non‐activated imines and nitriles proceeds quickly, efficiently, and chemoselectively with a broad range of substrates at room temperature and under air with water as the only reaction medium. Secondary amines and tertiary carbinamines are furnished in yields of up to
Reductive <i>tert</i>-Butylation of Anils by <i>tert</i>-Butylmercury Halides<sup>1</sup>
作者:Glen A. Russell、Lijuan Wang、Ragine Rajaratnam
DOI:10.1021/jo961544f
日期:1996.1.1
promote a free radicalchain process involving electrontransfer by substrate activation and/or by increasing the electron affinity of the intermediateradicals. Since the adduct radicals formed from benzylideneanilines are more easily protonated than the parent Schiff bases, PTSA but not NH(4)(+) demonstrates substrate activation, although both proton donors promote the free radicalreaction.
The chemistry of alkylstrontium halide analogues was examined. In the presence of metallic strontium, the Barbier-type alkylation of imines with alkyl iodides proceeded smoothly at room temperature under an argon atmosphere to afford the corresponding alkylated amines in good yields.
A new synthesis of β-phenylaminothioesters and β-lactams base-induced ring-opening of 2-phenyl-3-aryl-5-phenyl-thioisoxazolidines
作者:Leonardo Di Nunno、Antonio Scilimati
DOI:10.1016/s0040-4020(01)80250-7
日期:1993.1
Treatment of 2-phneyl-3-aryl-5-phenylthioisoxazolidines with alkyllithiums (n-BuLi, t-BuLi) at −78°C in THF gives β-phenylaminothioesters and/or the corresponding β-lactams in good yields. Complete conversion of β-aminothioesters into β-lactams can in any case be accomplished by treating them with CH3MgI/Et2O at 0° C. Isoxazolidine ring fragmentation to phenyl thioacetate and an imine is instead observed
苯基乙烯基硫醚与芳基N-苯基,N-甲基或N-叔丁基硝基的1,3-偶极环加成反应得到2-苯基(或2-甲基或2-叔丁基)-3-芳基-5-苯基硫代异恶唑烷根据已经公知的将不高度缺乏电子的双极性亲和剂环加成到硝酮上的区域选择性。在-78°C下于THF中用烷基锂(n -BuLi ,t -BuLi)处理2-苯甲基-3-芳基-5-苯基硫代异恶唑烷,得到高收率的β-苯基氨基硫代酯和/或相应的β-内酰胺。在任何情况下,都可以通过用CH 3 MgI / Et 2处理将β-氨基硫酯完全转化为β-内酰胺相反,通过在室温下或在N-烷基异恶唑烷的情况下进行反应,观察到异恶唑烷环断裂成硫代乙酸苯酯和亚胺是主要途径或排他性途径。
Exploiting Deep Eutectic Solvents and Organolithium Reagent Partnerships: Chemoselective Ultrafast Addition to Imines and Quinolines Under Aerobic Ambient Temperature Conditions
作者:Cristian Vidal、Joaquín García-Álvarez、Alberto Hernán-Gómez、Alan R. Kennedy、Eva Hevia
DOI:10.1002/anie.201609929
日期:2016.12.23
the long‐held dogma that organolithium chemistry needs to be performed under inert atmospheres in toxic organic solvents, chemoselective addition of organolithiumreagents to non‐activated imines and quinolines has been accomplished in green, biorenewable deep eutectic solvents (DESs) at room temperature and in the presence of air, establishing a novel and sustainable access to amines. Improving on