An environmentallyfriendly one-pot synthesis of 2-arylbenzofurans under ambient temperature has been developed. It features an ortho-hydroxyl group assisted Wittig reaction of substituted salicylaldehyde followed by an in situ oxidative cyclization. Its advantages include readily available and non-hazardous materials, benign reaction conditions (room temperature, green solvent and one-pot manner), easy work-up and high overall yields. Utilizing this methodology, various 2-aryl-benzofurans including four natural products have been synthesized.
我们开发出了一种在常温下环保型单锅合成 2-芳基
苯并呋喃的方法。其特点是取代
水杨醛的正羟基辅助维蒂希反应,然后原位氧化环化。其优点包括:材料易得且无害、反应条件温和(室温、绿色溶剂和单锅方式)、易于操作和总产率高。利用这种方法合成了各种 2-芳基
苯并呋喃,包括四种
天然产物。