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Diethyl zinc, reaction with carbenes

Reactions with zinc were accomplished at room temperature, lower yields of difluorocyclopropanes resulted if solvents other than tetrahydrofuran (diethyl ether, acetonitrile, dimethyl-formamide) were utilized. Experimental data indicate that free carbene is generated by this method. Good yields of 1,1-difluorocyclopropanes were obtained with electron-rich alkenes. ... [Pg.601]

Simmons-Smith reaction Areactionin which a cyclopropane ring is produced from an alkene. It uses the Simmons-Smlth recent, which was originally diiodo-methane (CH2I2) with aZn/Cu couple. Usually, diethyl zinc is used rather than Zn/Cu. The mechanism involves the formation of H2C(I) (Znl) and carbene transfer from the zinc to the double bond of the alkene. [Pg.752]

See other pages where Diethyl zinc, reaction with carbenes is mentioned: [Pg.14]    [Pg.461]    [Pg.78]    [Pg.174]    [Pg.5]    [Pg.250]    [Pg.46]   
See also in sourсe #XX -- [ Pg.5 ]

See also in sourсe #XX -- [ Pg.5 ]



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Carbene reactions

Carbenes reactions

Reaction with carbenes

With Carbenes

With zinc

Zinc reaction

Zincs reactions with

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