A number of 3-triorganosilyl- and 3-trimethylgermyl-2,5-dihydrofurans have been prepared by the cyclization of 2-triorganosilyl(germyl)-2-butene-1,4-diols obtained from the hydrosilylation and hydrogermylation products of 1,4-bis(trimethylsiloxy)-2-butyne. It has been found that the liquid-phase heterogeneous hydrogenation of these compounds over palladium catalysts is accompanied by simultaneous isomerization
通过从1的
硅氢加成和加
氢甲
硅烷基化产物中获得的2-三有机甲
硅烷基(
锗烷基)-
2-丁烯-1,4
-二醇的环化反应,已经制备了许多3-triorganosilyl-和3-trimethylgermyl-2,5-dihydrofurans。 4-双(三
甲基甲
硅烷氧基)-
2-丁炔。已经发现这些化合物在
钯催化剂上的液相非均相
氢化伴随着同时的异构化和歧化,从而给出相应的3-(4,5-二
氢呋喃基)-,3-
四氢呋喃基-和3-
呋喃基-衍
生物。