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Methods presently available1 for the preparation of cycloheptatriene (I) involve ring expansion of a six-carbon cycle as the key reaction step. We wish to report a novel and convenient synthesis of I which involves opening of the cyclobutane ring in a derivative of bicyclo [3.2.0jheptane. Reduction of the readily prepared (from cyclopentadiene and ketene)2 bicyclo [3.2.0]hept-2-ene-6-one with lithium aluminum hydride afforded (95%) bicyclo [3.2.0]hept-2-ene-6-ol (II), b.p. 96-98°( 38 mm.), k26d 1.4987 (Caled, for C7HI0O: C, 76.32; , 9.15.

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