A novel rearrangement of N-propargyl vinylaziridines. Mechanistic diversity in the aza-[2,3]-wittig rearrangement
作者:Jens Åhman、Peter Somfai
DOI:10.1016/0040-4039(96)00302-4
日期:1996.4
N-Propargyl vinylaziridines 4a-c have been prepared. The anionic rearrangement of 4a,b gives the trans-2,6-disubstituted tetrahydropyridines 5a,b, respectively, as the major products while 4c gives 1-pyrroline 7c exlusively. The mechanism for the formation of pyrrolines in these reactions is discussed.
A qualitative investigation of substituent effects in the homodienyl-[1,5]-hydrogen shift in vinylaziridines
作者:Peter Somfai、Jens Åhman
DOI:10.1016/0040-4039(95)00165-9
日期:1995.3
The homodienyl-[1,5]-hydrogen shift in vinylaziridines 4a-h has been investigated. It has been found that substituents capable of conjugation at the rearrangement origin will reduce the reaction time while substituents on the vinyl moiety affect the rate most notably when they are capable of interfering sterically with the other ring substituents.