Synthesis of multisubstituted 1,3-butadienes using the ruthenium-catalysed double addition of trimethylsilyldiazomethane to alkynylboronates
作者:Ryotaro Morita、Eiji Shirakawa、Teruhisa Tsuchimoto、Yusuke Kawakami
DOI:10.1039/b501990g
日期:——
alkynylboronates instead of alkynes. Di- and tetrasubstituted 1,3-butadienes were prepared from a 2-boryl-1,4-disilyl-1,3-butadiene, using the Suzuki-Miyaura coupling reaction, iodolysis of the alkenylsilane moieties with N-iodosuccinimide and hydrolysis of the carbon-silicon bonds with trifluoroacetic acid. The same compound was converted also to a bicyclic compound, a trisubstituted 1,3-butadiene and
Dixneuf和他的同事开发的钌催化的三甲基甲硅烷基重氮甲烷向炔烃的双加成反应被用于合成2-烷基或2-芳基-3-(4,4,5,5-四甲基-1,3,2 -二氧杂硼烷-2-基)-1,4-双(三甲基甲硅烷基)-1,3-丁二烯通过使用炔基硼酸酯而不是炔烃。使用Suzuki-Miyaura偶合反应,烯基硅烷部分与N-碘代琥珀酰亚胺的碘化反应以及二氢呋喃的水解反应,由2-硼基-1,4-二甲硅烷基-1,3-丁二烯制备二和四取代的1,3-丁二烯碳-硅键与三氟乙酸键合。通过Diels-Alder反应,烯基硼酸酯部分的氧化和Mukaiyama aldol反应,将相同的化合物也转化为双环化合物,三取代的1,3-丁二烯和二烯酮。