Formation of Organomagnesium Compounds via EtMgBr-Mediated Radical Cyclization of Allyl β-Iodoacetals
摘要:
[GRAPHICS]Treatment of allyl beta-iodoacetals with ethylmagnesium bromide in THF provided tetrahydrofuran derivatives in good yields. On the other hand, the reaction in DME provided tetrahydrofuranylmethylmagnesium compounds in good yields.
Tri-2-furylgermane proved to be an effective reagent for the radical reduction of organichalides. Treatment of 1-bromododecane with tri-2-furylgermane in THF at 25 °C in the presence of a catalytic amount of triethylborane afforded dodecane almost quantitatively. Radical cyclization of 2-iodoethanal allyl acetal afforded five-membered products under the same reaction conditions. These reactions proceeded