Pyridine → 4(2-chloroallyl)benzyl(1R)cis-3(2,2-dibromovinyl)-2,2-dimethylcyclopropane carboxylate

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Reaction Steps

The alcohol of Example 2 (0.078 g) in benzene (2 ml) is added to (IR)cis 3-(2,2-dibromovinyl)2,2-dimethylcyclopropane carbonyl chloride (0.135 g) in benzene (3 ml). Pyridine (0.06 ml) is then added and the mixture stirred at 20° for 16 hours. This is chromatographed on florisil and the fraction eluted by 7% ether in petrol evaporated to a residue of 0.19 g (96%) ester, nD20 1.5692.

Provenance & Evidence