Nonacarbonyldiiron-Induced Reaction of 3-Azido-1,2,3-triphenylcyclopropene and 4,5,6-Triphenyl-1,2,3-triazine
作者:Tomoshige Kobayashi、Naoki Murata、Makoto Nitta
DOI:10.1246/bcsj.60.3062
日期:1987.8
The [Fe2(CO)9]-induced reaction of 3-azido-1,2,3-triphenylcyclopropene (1) undergoes elimination of a nitrogen molecule and C–C bond cleavage to result in the formation of benzonitrile, diphenylacetylene, 2,3-diphenylinden-1-one, and 1,2,3-triphenylpropen-1-one. The similar reaction of 4,5,6-triphenyl-1,2,3-triazine, which is an isomer of 1, undergoes reductive N–N bond cleavage to give 3,4,5-triphenylpyrazole in good yield.
Generation and Trapping of Cyclopropenes from 2-Alkoxy-1,1-dichlorocyclopropanes
作者:Paul Müller、Nicole Pautex
DOI:10.1002/hlca.19910740108
日期:1991.1.30
In presence of crown ether, 2-alkoxy-1,1-dichlorocyclopropanes react with t-BuOK/THF preferentially via ring opening to 2-chloroalk-2-en-1-ones and alkynones or to chlorocyclopropenes. The latter may be intercepted with 1,3-diphenylisobenzofuran, but in the absence of trapping agent, the rearrangement to vinylcarbenes does not occur.
Rh(II)-Catalyzed Isomerizations of Cyclopropenes Evidence for Rh(II)-Complexed Vinylcarbene Intermediates
作者:Paul Müller、Nicole Pautex、Michael P. Doyle、Vahid Bagheri
DOI:10.1002/hlca.19900730513
日期:1990.8.8
The thermocatalytic rearrangements of cyclopropenes 1-4 have been investigated in the presence of Rh(IT) perfiuorobutyrate. 1, 2, 3-Triphenylcyclopropene (1a) undergoes rearrangement lo diphenylindene 5a or, with alkoxycyclopropene derivatives, to α, β-unsaturated ketone 6. Furan formation occurs with 2, 3-diphenylcyclo-propenecarboxylate 2, but the diethyl counterpart 3 rearranges to dienoate 8. 2-