Copper borates reaction with allylic halides

The ate-complexes (34) also react with benzylic halides aroyl chlorides allyl halides and proj r l halides to afford the (x>rr ponding products, respectively (Eq. 75). (E)-a,P-Unsaturated carboxylic esters can also be obtains by the reaction of such borate complexes with ethyl propiolate The same type of reaction between copper(I) methyltrialkylborates and l-(l-pyrrolidinyl)-6-chloro--1-cyclohexene gives the corresponding alkylation products which are readily hydrolyzed to 2-alkylcyclohexanone... 

Suzuki reported that copper borates (RsMeB Cu ) exhibit predominant Sn2 reactivity toward allylic halides. A similar ate complex (RFaB Cu ) is also proposed to be the reactive intermediate in the RCu BFa system developed about the same time by Yamamoto and coworkers. This latter reagent exhibits remarkable Sn2 regiospecificity in reactions with a variety of allylic substrates, including halides. 

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See also in sourсe #XX -- [ , ]

See also in sourсe #XX -- [ ]

See also in sourсe #XX -- [ , ]

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