Preparation of alka-2,4-dienylsilanes and 3-cyclopropylprop-2-enylsilanes by the titanocene(II)-promoted reaction of 2,4-bis(phenylthio)but-3-enylsilanes
Preparation of allylsilanes by the Cp2Ti[P(OEt)3]2 (1)-promoted reaction of 2,4-bis(phenylthio)but-3-enylsilanes 5 is described. The olefination of carbonyl compounds 6 using the silanes 5 and the low-valent titanium species 1 produced alka-2,4-dienylsilanes 2. 3-Cyclopropylprop-2-enylsilanes 3 were obtained by the reaction of 5 with 1 in the presence of terminal olefins 9.
描述了通过Cp 2 Ti [P(OEt)3 ] 2(1)促进的2,4-双(苯硫基)丁-3-烯基硅烷5反应制备烯丙基硅烷。使用硅烷5和低价钛物质1对羰基化合物6进行的烯烃化反应产生了碱2,4-二烯基硅烷2。通过5与1在末端烯烃9的存在下反应,获得3-环丙基丙-2-烯基硅烷3。