| Budget Amount *help |
¥15,100,000 (Direct Cost: ¥15,100,000)
Fiscal Year 2003: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2002: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2001: ¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 2000: ¥6,700,000 (Direct Cost: ¥6,700,000)
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| Research Abstract |
Rhodium(I)-catalyzed intramolecular olefin insertion reactions of o-Styryl-substituted cyclobutanones were studied. When 3-(o-Styryl)cyclobutanone (1) was heated in m-xylene in the presence of a catalytic amount of Rh(I)-DPPE (Ph_2P(CH_2)_nPPh_2,n = 2) complex, 4-(o-styryl)-3-buten-2-one was obtained in 51% yield. The reaction of 1 in the presence of Rh(I)-DPPP (n=3) complex afforded benzobicyclo[3.2.1]octan-3-one in 81% yield. Decarbonylation of 1 occurred in the presence of Rh(I)-DPPB (n=4) complex to give 1-isopropenyl-2-vinylbenzene in 93% yield. 2-(o-Styryl)cyclobutanone underwent intramolecular olefin insertion reaction in the presence of Rh(I)-P(o-MeOC_6H_4)_3 complex to furnish eight-membered ring unsaturated ketones in 75% yield.
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