Metallation of Alkenes, Dienes, and Polyenes at the Allylic Position

4 Metallation of Alkenes, Dienes, and Polyenes at the Allylic Position 

The selective and efficient metallation of alkenes in the allylic position by the Schlosser s base is certainly one of the major achievements in the field of superbase chemistry. A complete list of successful alkene metallations by superbases would be too long for the purpose of this chapter but some representative examples are shown in Tables 2 and 3 as a general trend for the unsubstituted and heterosubstituted alkenes, respectively. 

C A-olcfins react faster than the corresponding /rattr-isomers.59 60 The order of reactivity of allylic alkyl groups is methyl methylene methine.21 LIC-KOR is, in general, able to exchange protons of the first two classes while the 

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