Abstract
AbstractThe cis‐dilithioalkene (III) is stable in solution at ‐30 °C (trapping experiments with MeOD, (MeO)2SO2, and CO2 (IV) to give, e.g., (V)); above ‐30 °C cyclopropane‐bond cleavage occurs to give a linear intermediate which undergoes elimination of CH2=CH2 followed by deprotonation yielding finally trilithio compound (VI).
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