Benzofuran systems. Regioselective bromination and some other reactions of 1-(3-benzofuranyl)-2-phenylethanones
作者:Halina Kwiecień、Ernst Baumann
DOI:10.1002/jhet.5570350647
日期:1998.11
selective bromination of hydroxy 1a,b and methoxy 1c,d ethanones, respectively. A successful method of O-alkylamination of 5a with N-(2-chloroethyl)-N,N-diethylammonium chloride to 6a by a two-phase reaction under phase transfer conditions has been applied. Lithium aluminium hydride reduction of the carbonyl group of 1b to carbinol 4b was carried out in good yields.
1- [3-(2-烷基苯并呋喃基)]-2-(3,5-二溴-4-羟基苯基)乙酮5a,b和1- [3-(2-烷基苯并呋喃基)-2-(3-溴-4-分别通过选择性溴化羟基1a,b和甲氧基1c,d乙酮可以容易地制备甲氧基苯基)乙酮3a,b。的一个成功的方法ö的-alkylamination 5A与Ñ(2-氯乙基) - - N,N- -diethylammonium酰氯6A通过相转移条件下的两相反应得到了应用。氢化锂铝将1b的羰基还原为甲醇4b的收率很高。