Intramoleculare (4+2)-cycloadditionen mit inversem elektronenbedarf
作者:H Schuster、J Sauer
DOI:10.1016/s0040-4039(00)88268-4
日期:1983.1
1,2,4,5-Tetrazines, 1,2,4-triazines, α-pyrones and cyclopentadienones are reacted with bifunctional dienophiles 6 – 9 to yield semibullvalenes, snoutenes, azasnoutenes and polycyclic azo compounds or carbocycles in few steps.
sequence to give 3,4-diazanorcaradienes 9 with endo configuration of the methyl group at C-7. On gentle heating in inert solvents, these 3,4-diazanorcaradienes 9 are cleanly transformed into semibullvalenes 11. This reaction sequence can also be performed as a one-pot method. Kinetic investigations and comparisons with two model systems are in agreement with the proposed reaction mechanism.
1,3,4-Oxadiazole als heteroctglische 4π-komponenten in diels-alder-reaktionen
作者:Franz Thalhammer、Uwe Wallfahrer、Jürgen Sauer
DOI:10.1016/0040-4039(88)85129-3
日期:1988.1
Oxadiazoles react with angle strained, alkenes and alkynes to yield mono- and bisadducts , , with loss of molecular nitrogen. The use of cyclopropenes opens a new route to γ-pyrans . Also ynamines react as alkynes to give furan derivatives .
Photoinduced electron-transfer reactions: rearrangement of a bicyclopropenyl radical cation
作者:Christopher J. Abelt、Heinz D. Roth
DOI:10.1021/ja00299a014
日期:1985.6
Reaction du dimethyl-1,1' bicyclopropene-2yle avec le chloranile et le fluoranile. Obtention des o- et m-xylenes. Mise en evidence de l'intermediaire dimethyl-3,4 benzvalene
反应 du 二甲基-1,1' 双环丙烯-2yle avec le chloranile et le fluoranile。获得脱氧和间二甲苯。Mise en evidence de l'intermediaire dimethyl-3,4 benzvalene
Tsuji, Takashi; Miura, Toshimasa; Sugiura, Kenichi, Journal of the American Chemical Society, 1993, vol. 115, # 2, p. 482 - 493