Gas-phase pyrolysis of 2,3-dihydro-1,4-diazepines: involvement of the saturated portion of the ring in chemical reactions and novel cis–trans isomerisation of a fused ring system
作者:Michael J. Ellis、Douglas Lloyd、Hamish McNab、Marion J. Walker
DOI:10.1039/c39950002337
日期:——
Flashvacuumpyrolysis of 2,3-dihydro-1,4-diazepines in the range 450–550 °C involves interaction of the saturated portion of the molecule with the vinamidine system and causes 1,5-hydrogen shifts which have been established by deuterium labelling experiments; at higher temperatures, ring contraction occurs to give pyrazines as major products.
AVERSA, MARIA C.;BONACEORSI, PAOLA;GIANNETTO, PLACIDO;LEIGH, DAVID A., J. HETEROCYCL. CHEM., 26,(1989) N, C. 1619-1622
作者:AVERSA, MARIA C.、BONACEORSI, PAOLA、GIANNETTO, PLACIDO、LEIGH, DAVID A.
DOI:——
日期:——
Aversa, Maria C.; Bonaccorsi, Paola; Giannetto, Placido, Journal of Heterocyclic Chemistry, 1989, vol. 26, p. 1619 - 1622
作者:Aversa, Maria C.、Bonaccorsi, Paola、Giannetto, Placido
DOI:——
日期:——
Electrochemical reduction of the 5,7-diphenyl-2,3-dihydro-1,4-diazepinium cation
作者:Douglas Lloyd、Colin A. Vincent、David J. Walton
DOI:10.1039/p29800000668
日期:——
The 5,7-diphenyl-2,3-dihydro-1,4-diazepiniumcation (II), dissolved in dimethylformamide, is reduced in two steps. The first wave, at –1.23 V with respect to an aqueous Ag–AgCl–KCl (saturated) reference, provides a radical which disproportionates to give the corresponding dihydrodiazepine base (I) and a tetrahydrodiazepine (IV). The second wave is at –2.00 V and produces the anion (IV). The reduction