Alcohols of various structures, in particular, ethylene, acetylene, fluorocontaining alcohols, add regio- and chemoselectively to the vinyloxy group of vinyloxyalkyl methacrylates at 20-40degreesC in the presence of catalytic quantities of trifluoroacetic acid affording functional acetalmethacrylates in high yield.
This invention resides in a process for production of predominantly a 1,4-O-metallation product of a hydride of silicon, germanium, or tin with an α,β-unsaturated carbonyl compound. The reaction involved takes place in the presence of a heterogeneous noncomplexed rhodium-containing catalyst. This invention also resides in 1,4-O-metallation compositions having perfluoroalkyl R groups on either side of the C=C bond of an enol ether or on the acetal side of the C=C bond of a ketene acetal.
本发明涉及一种主要生产硅、锗或锡的氢化物与α,β-不饱和羰基化合物的 1,4-O-金属化产物的工艺。该反应是在含铑的非络合异相催化剂存在下进行的。本发明还涉及在烯醇醚的 C=C 键两侧或烯酮缩醛的 C=C 键的缩醛侧具有全氟烷基 R 基团的 1,4-O-金属化组合物。