Dibromocarbene Addition to Simple Olefins

An alternate interpretation of the effect of alcohol is as follows like chloroform, bromoform is deprotonated at the interface and, because the tribromomethyl anion 

Dibromocarbene has been successfully generated under phase transfer conditions and added to a variety of olefmic substrates. These include isolated double bond systems, styrenes, conjugated dienes, allenes, cyclopropanated olefins, vinyl ethers, allylic halides, and enynes. It is interesting to note that with the latter class of compounds, dibromocarbene addition to double bonds appears to be favored over addition to triple bonds. The simple addition of dibromocarbene according to equation 4.1 to a number of substrates is recorded in Table 4.1. 

Number Alkene of carbons % Yield Catalyst Refer- ences 

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