Reactions of camphor-, and camphene-derived formyl [2.2.1]bicyclic carbinols with Grignard and organolithium reagents afford the corresponding regio- and stereospecific alkyl/aryl [3.2.1]bicyclic diols. Some of these bicyclic diols have been treated with lead tetraacetate to provide new chiral cyclopentane derivatives. A plausible mechanism of the ring expansion-alkylation reaction is proposed.
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