Base catalysed rearrangements involving ylide intermediates. Part 11. Rearrangements of 3-phenylprop-2-ynylammonium ylides
作者:Sivapathasuntharam Mageswaran、W. David Ollis、Dolores A. Southam、Ian O. Sutherland、Yodhathai Thebtaranonth
DOI:10.1039/p19810001969
日期:——
novel [1,3] rearrangementinvolving the migration of a dimethylamino-group. The basecatalysedrearrangements of the bicyclic propynylammonium salts (52) and (56) do not show the inhibition expected for concerted [3,2] sigmatropic rearrangements in such bicyclic systems. This observation provides further evidence for a two-stage mechanism for the apparent [3,2] sigmatropic rearrangement of propynylammonium
THE REACTION OF α-SUBSTITUTED DEOXYBENZOINS WITH HEXAMETHYLPHOSPHORIC TRIAMIDE. FORMATION OF A NOVEL CYCLIC ENAMIDOPHOSPHATE
作者:Richard S. Monson、Adina Baraze
DOI:10.1246/cl.1976.555
日期:1976.6.5
The reaction of benzoin and other substituteddeoxybenzoins with HMPT has been investigated. Along with modest yields of tetraphenylpyridine, the major product in all cases is 2-dimethylamino-4, 5-diphenyl-3-methyl-1-oxa-3-aza-2-phosphacyclopent-4-ene 2-oxide (5). meso-Hydrobenzoin similarly gives 2-dimethylamino-4,5-diphenyl-1,3-dioxa-2-phosphacylopentane 2-oxide (4). The mechanism of formation of
The reductive coupling of tertiary amides to give enediamines using PhMe2SiLi
作者:Ian Fleming、Usha Ghosh、Stephen R. Mack、Ian Fleming、Usha Ghosh、Stephen R. Mack、Barry P. Clark
DOI:10.1039/a800648b
日期:——
PhMe2SiLi reacts with tertiary amides to give enediamines, which can be isolated in good yield when the α-carbon is branched; the enediamines can be hydrolysed more or less easily to α-amino ketones, isomerised from Z to E, oxidised to dienediamines and isomerised to amino enamines.
作者:Welle, Frank、Verevkin, Sergej P.、Keller, Manfred、Beckhaus, Hans-Dieter、Ruechardt, Christoph
DOI:——
日期:——
Superelectrophilic chemistry of amino-nitriles and related substrates
作者:Erum K. Raja、Douglas A. Klumpp
DOI:10.1016/j.tet.2011.04.038
日期:2011.6
The superacid-promoted Houben/Hoesch reactions of amino-nitriles and related compounds have been studied. The nitriles form dicationic electrophiles and react with benzene in fair to good yields (12-95%). The intermediate iminium ions may also be reduced to the benzylic amines by NaBH4 or H-2. (C) 2011 Elsevier Ltd. All rights reserved.