The Coupling of Compounds with the formula R′‐CXLi‐R2 (R′: ‐ alkyl; R2: ‐H, ‐Me; X: ‐Cl, ‐Br) with carbonyl Compounds at ‐ l I5°C leads to the formation of lithium salts of halohydrins which readily produce epoxides in the presence of LiBr.
sek.‐Butyl‐lithium (I) reagiert mit Dihalogenalkylsilanen (II) bzw. (VI) zu den entsprechenden Carbenoiden (III) und (VII), die in guten Ausbeuten erhalten werden.
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