A new route to secondary amines from bis-(alkoxymethyl)-alkylamines - the activation of an aminomethyl group and protection of the product by the same functional group
作者:Martyn J. Earle、Robin A. Fairhurst、Harry Heaney、George Papageorgiou、Robert F. Wilkins
DOI:10.1016/s0040-4039(00)97589-0
日期:1990.1
variety of acidic reagents affords good yields of N-alkoxymethyl-N-alkylmethyleneiminium salts which react with trimethylsilyl enol ethers, and nucleophilic aromatic substrates to form protected secondary amines or tertiary amines by domino reactions; silyl ketene acetals afford tertiary amines only.
The use of bis(aminol) ethers derived from aliphatic primary amines in the synthesis of secondary and tertiary amines
作者:Harry Heaney、George Papageorgiou
DOI:10.1016/0040-4020(96)00026-9
日期:1996.3
prepared from primary aliphatic amines and benzylamine together with formaldehyde and either ethanol or methanol; they were reacted with electrophiles to give N-alkyl-N-alkoxymethyl-methyleneiminium salts which gave mixtures of secondary and tertiaryamines in reactions with electron rich aromatic compounds: sequential reactions with two different nucleophiles gave the expected tertiaryamines.
Synthesis of <i>gem</i>
-Difluorinated Spiro-γ-lactam Oxindoles by Visible-Light-Induced Consecutive Difluoromethylative Dearomatization, Hydroxylation, and Oxidation
作者:Qiang Wang、Yi Qu、Qing Xia、Hongjian Song、Haibin Song、Yuxiu Liu、Qingmin Wang
DOI:10.1002/chem.201802141
日期:2018.8.6
Described herein is a protocol for visible‐light‐induced consecutivesynthesis of gem‐difluorinated spiro‐γ‐lactam oxindoles under mild conditions by means of a process involving sequential radical difluoromethylativedearomatization, hydroxylation, and oxidation. The protocol features high chemo‐ and regioselectivity, good functional group tolerance, and easy scalability. Several of the functionalized