The readily obtained N,N-bis(trimethylsilyl)-propargylic amines are shown to be useful precursors of various functional protectedprimaryamines. It readily gives rise to N,N-bis(trimethylsilyl)dienamines, 2-aza-1,3,5-hexatrienes, α-allenic amines, substituted allylamines and lactams.
The reactions of lithium N,N-bis(trimethylsilyl)aminomethyl acetylide with electrophilicreagents offered a short preparation of substituted and functional propargyl amines. These are shown to be useful precursors of various unsaturated protected primary amines. Addition reactions to the carboncarbon triple bond or isomerisation reactions gave rise to allylic, dienic and α-allenic amines.
Silver-Catalyzed Intramolecular Aminofluorination of Activated Allenes
作者:Tao Xu、Xin Mu、Haihui Peng、Guosheng Liu
DOI:10.1002/anie.201103225
日期:2011.8.22
A nice combination: The intramolecular oxidative aminofluorination of allenes using silver catalysis and FN(SO2Ph)2 as the fluorinating reagent has been developed. This reaction represents an efficient method for the synthesis of various 4‐fluoro‐2,5‐dihydropyrrole compounds. Further transformation provided the corresponding fluorinated pyrrole derivatives in good yields (see scheme).
Gold-Catalyzed Cyclization of Nonterminal Propargylic Amides to Substituted Alkylideneoxazolines and -oxazines
作者:A. Stephen K. Hashmi、Andreas M. Schuster、Martin Schmuck、Frank Rominger
DOI:10.1002/ejoc.201100342
日期:2011.8
The substrate scope of the gold-catalyzedcyclization of nonterminal propargylic amides to oxazolines and oxazines was investigated. Sixteen alkyl-substituted and 35 aryl-substited substrates were prepared by a very variable route from trimethylsilyl-(TMS-)protected, nonterminal propargylamines. Steric and electronic influences of the substituents on product selectivity were studied. A chloromethyl
The present invention relates to compounds which are allenyl amines, more specifically, .beta.-ethenylidene-(substituted)ethanamines, possessing antihypertensive activity. They are prepared by a noval reaction of a protected N,N-bis(trimethylsilyl)-4-methoxy-2-butynylamine compound with a metallo-organic compound, with subsequent removal of the silyl protecting groups to provide the desired compound.