The addition of Grignard reagents across carbon–carbon multiple bonds (carbomagnesiation) is a principal and important reaction in organic syntheses for the generation of Grignard reagents with the complicated structure of carbon skeletons. 1 It is known that methyl, aryl, allyl, and primary-alkyl Grignard reagents efficiently undergo carbomagnesiation and form diverse unsaturated hydrocarbons such as alkenes, alkynes, and dienes in the ...
