cyclization reaction between alkynes and 2-bromo-2-(2-methoxybenzyl)malonate via visible light-induced photoredox catalysis has been reported. In the presence of 1 mol % fac-Ir(ppy)3, a variety of spiro[4.5]deca-1,7,9-trien-6-ones were obtained in moderate to excellent yields under mild conditions. Under the optimized reaction conditions, a sample reaction of 3 mmol scale proceeded smoothly to give the
据报道,
炔烃和2-
溴-2-(2-甲氧基苄基)
丙二酸酯之间通过可见光诱导的光氧化还原催化的高效邻位定环反应。在1mol%的fac- Ir(ppy)3的存在下,在温和的条件下以中等至优异的产率获得了各种螺[4.5] deca-1,7,9-
三烯-6-。在优化的反应条件下,3 mmol规模的样品反应平稳进行,以84%的收率得到了所需的产物,催化剂负载量仅为0.1 mol%。