ω-Haloacylsilanes 1a–d were transformed by H2S/HCl into the corresponding silylthiones 2 which underwent enethiolization on base treatment. Enethiols 3 cyclizedintramolecularly to afford the title compounds 4a–d in high yields.
ω-卤代硅烷1a-d通过H 2 S / HCl转化为相应的甲硅烷基硫酮2,在碱处理中进行了烯硫化。烯硫醇3分子内环化,以高收率得到标题化合物4a-d。