engleski

Synthesis of organometallic compounds under high pressure

High pressure synthesis of novel policyclic structures containing silicon and germanium atoms placed at the bridgehead positions, (organometallic derivatives of bicyclo(2.2.1)hept-2-ene) will be presented. Thus, 1-sila-2, 3, 4, 5-tetraphenyl-1, 1-dimethyl-2, 4-cyclopentadiene, 1-sila-2, 5-diphenyl-1, 1-dimethyl-2, 4-cyclopentadienes and 1-germa-2, 3, 4, 5-tetraphenyl-1, 1-dimethyl-2, 4-cyclopentadiene are used as reactive dienes, which readily undergo [4p+2p] cycloadditions with strained alkenes incorporated in norbornene skeleton (for instance, anti-1, 4:5, 8-diepoxy-1, 4, 5, 8-tetrahydroanthracene was used as a dienophile) to give 7-silanorbornene or 7-germanorbornadiene derivatives.

High pressure; cycloadditions; organometallics

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