VACUUM-THERMAL FRAGMENTATION AND RING-CLEAVAGE OF 1-(N-SUBSTITUTED-PYRROL-2-YL)-3-TOSYLTRIAZENE TETRAALKYLAMMONIUM SALTS TO 4-CYANO-1-AZABUTA-1,3-DIENES
D. Nanni et P. Zanirato, VACUUM-THERMAL FRAGMENTATION AND RING-CLEAVAGE OF 1-(N-SUBSTITUTED-PYRROL-2-YL)-3-TOSYLTRIAZENE TETRAALKYLAMMONIUM SALTS TO 4-CYANO-1-AZABUTA-1,3-DIENES, Journal of the Chemical Society. Perkin transactions. I, (7), 1997, pp. 1003-1004
N-Methyl- and N-phenyl-4-cyano-1-azabuta-1,3-diene (1a and 1b respecti
vely) are produced by vacuum-thermal fragmentation and ring cleavage o
f 1-(N-substituted-pyrrol-2-yl)-3-tosyltriazene tetraalkylammonium sal
ts, prepared by reaction of the corresponding 2-lithiopyrroles with to
syl azide and successive reaction of the resulting lithium triazene sa
lts with tetraalkylammonium bromide.