Aryl N-methyliminodiacetic acid (MIDA) boronates from cyclotrimerization of ethynyl MIDA boronate with diynes
作者:Silje Melnes、Annette Bayer、Odd R. Gautun
DOI:10.1016/j.tet.2013.07.027
日期:2013.9
Cyclotrimerizations of ethynyl N-methyliminodiacetic acid (MIDA) boronate (1) with 1,6-diynes 2 have been studied, using three different catalysts (based on ruthenium, rhodium, and iridium) and variable reaction conditions. Successful cyclotrimerization reactions were obtained with both Cp*RuCl(cod) and Rh(cod)2BF4/BINAP as pre-catalysts in THF or acetone. Ruthenium-catalyzed cyclotrimerization of
使用三种不同的催化剂(基于钌,铑和铱)和可变的反应条件,研究了乙炔基N-甲基亚氨基二乙酸(MIDA)硼酸酯(1)与1,6-二炔2的环三聚反应。使用Cp * RuCl(cod)和Rh(cod)2 BF 4 / BINAP作为四氢呋喃或丙酮的预催化剂,成功地完成了环三聚反应。钌催化的不对称溴取代的二炔(2f)与1的钌催化环三聚反应成功扩大规模(2 g),并包括在针对酪氨酸激酶2潜在选择性抑制剂的总合成策略中。