Polylithiumorganic compounds: Part 28. The reaction of allene and alkyl substituted allenes with lithium metal

A Maercker, A Tatai, B Grebe, U Girreser

Index: Maercker, Adalbert; Tatai, Andrea; Grebe, Burkhard; Girreser, Ulrich Journal of Organometallic Chemistry, 2002 , vol. 642, # 1-2 p. 1 - 8

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Citation Number: 7

Abstract

The reaction of allene (3a) and alkyl substituted allenes 1, 2-hexadiene (3b), cyclopropylallene (3c), and vinylidene cyclopropane (3d) with lithium metal was investigated in order to access 2, 3-dilithioalkenes 4a–d. These dilithioalkenes 4a–d are very reactive in polar solvents like THF and act as strong bases, either metalation of the starting allene 3a–d, the solvent, or sufficiently acidic intermediates like 8 a–d is observed. The metalation ...