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Methyl 0-(2,2,3-trimethylcyclopropyl)acrylate (II) and 1-methoxycarbonyl-2,2-dimethyl-3-(l-propenyl)cyclopropane (12) were prepared from methyl fnms.frons-sorbate (10) according to the procedures described above. The isomers were separated by glpc using a 20 ft X 0.25 in. column of 10% SE-30 at 160°( At of 10, 7.8 min; 11, 16.4 min; 12, 11.8 min.Methyl 0-(2,2,3-trimethylcyclopropyl)acrylate ( 11): uv Xmax 242 nm; ir i/max 1725 cm""1; nmr 1.2 (9 H's, CCq^3 and CHSCH), 3.65 (s, COOCHa), 5.85 (d, J = 15 Hz, C=CH-COOCHa), 6.4 (m, C=CHCH); mass spectrum m/e 168 (M+).

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