Reactions of Acetals of α,β-Unsaturated Ketones with Silylated Nucleophiles as Trimethylsilyl Cyanide and Phenylthiotrimethylsilanes
作者:Teruaki Mukaiyama、Haruhiro Takenoshita、Masaaki Yamada、Tsunehiko Soga
DOI:10.1246/cl.1990.1259
日期:1990.8
(E)-chalcone derivatives with trimethyl cyanide recently reported from our laboratory. It was found consequently that previously assigned isomerized products were not Z-isomer of α-methoxy-β,γ-unsaturated nitriles, but γ-methoxy-α,β-unsaturated nitriles produced by double transfer of double bond and methoxy group. Reactions of thus formed nitriles with several silylated nucleophiles are also described.
苯基硫代三甲基硅烷与(E)-查尔酮二甲基乙缩醛反应的结果让我们重新研究了我们实验室最近报道的(E)-查尔酮衍生物的缩醛与三甲基氰化物反应得到的异构化产物的结构。结果发现,先前指定的异构化产物不是α-甲氧基-β,γ-不饱和腈的Z-异构体,而是通过双键和甲氧基双转移产生的γ-甲氧基-α,β-不饱和腈。还描述了由此形成的腈与几种甲硅烷基化的亲核试剂的反应。