A DIRECT METHOD FOR α-METHYLENEBUTYROLACTONE SYNTHESIS USING HOMOALLYL ALCOHOLS
作者:Isamu Matsuda
DOI:10.1246/cl.1978.773
日期:1978.7.5
3-Trimethylsily-3-buten-1-ols (1) are prepared by a ring opening of epoxides with α-trimethylsilvinylmagnesium bromide in the presence of catalytic amounts of CuI. 3-Bromo-3-buten-1-ols (2) derived from (1) react with Ni(CO)4 to give directly α-methylenebutyrolactones (4) with the assistance of potassium acetate in good yields except the case of a cyclopentanol derivative (2e).