Reactions Involving 1-Silyl-l-vinylcyclopropanes

2 Reactions Involving 1-Silyl-l-Vinylcyclopropanes 43.2.1 Synthesis Involving 1-Metallo-l-Vinylcyclopropanes 

Vinylcyclopropanes are also suitable starting materials for the construction of flve-membered cycles. The vinylcyclopropane rearrangement first discovered in the late 1950s immediately became the subject pfintense mechanistic investigations 

4 Diels-AMer Reactions Involving Allylidrae Cyclopropanes 

Allylidene cyclopropanes proved to be particularly reactive dienes especially if used as one of the partners in the Diels-Alder reaction They differ in that 

The formation of the meta-type adducts instead of the ortho ones can be rationalize on the basis of a mechanism involving radicals or ionic intermeiates in the transition smte (scheme 84). Intermediate structures lb) and 2b) can account for the r ults usually observe with dienes bearing alkyl oups wl eas intermediates such as (ia) and (2a), in which the strain due to the cyclopropyl ring is 

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