ISSN:
0009-2940
Schlagwort(e):
[4]Radialene derivative
;
1,2,3-Cycloheptatriene, dimerization
;
Cyclobuta[1,2:3,4]dicycloheptatetraene
;
Chemistry
;
Inorganic Chemistry
Quelle:
Wiley InterScience Backfile Collection 1832-2000
Thema:
Chemie und Pharmazie
Notizen:
Nickel(O)-Catalyzed Dimerization of 1,2,3-Cycloheptatriene: cyclobuta[1,2:3,4]dicyclopheptatetraene, a [4]Radialene DerivativeReaction of (7-bromotricyclo[4.1.0.02,7]hept-1-yl)trimethylsilane (4) with cesium fluoride in dimethylformamide at room temperature in the presence of (Ph3P)4Ni afforded a 32% yield of the [4]radialene derivative 3. The formation of 3 is interpreted as a Ni(0)-catalyzed dimerization of the elusive 1,2,3-cycloheptatriene (2), which is generated by thermal rearrangement of the highly strained tricyclo[4.1.0.02,7]hept-1(7)-ene (1). The X-ray structure of 3 shows an essentially planar [4]radialene subunit.
Zusätzliches Material:
1 Ill.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1002/cber.19891221230