Diiodomethane-Triisobutylaluminum

Dicarbonyl(cyclopentadienyl)[(di-methylsulfonium)methyl]iron(II) te-trafluoroborate, 98 Diiodomethane-Triisobutylaluminum, 114... [Pg.363]

Diiodomethane/zinc-copper couple and diiodomethane-triisobutylaluminum complex are particularly valuable reagents for the insertion of a methylene group into olefmic double... [Pg.190]

The fact that the Simmons-Smith reaction is regio- and stereoselective enabled the preparation of tritium containing cyclopropane derivatives useful for biological studies. The tritiated diiodomethane was prepared by reduction of iodoform with sodium arsenite in the presence of tritiated water. The carbene generated from tritiodiiodomethane and triisobutylaluminum in chloroform underwent regioselective addition to the unhindered double bond in perillyl alcohol (34). ... [Pg.273]

Treatment with triisobutylaluminum converts the saturated acetal 6 into the optically active enol ether 770. Cyclopropanation of 7 with the Simmons-Smith reagent then provides the cyclopropanol derivative 8 with a d.r. of 95 5. Even better side discrimination is observed when the more active diiodomethane/diethylzinc system is applied under optimized conditions70 the cyclopropanol derivative is obtained diastereomerically almost pure. [Pg.992]

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