Catalyst-free synthesis of diversely substituted 6H-benzo[c]chromenes and 6H-benzo[c]chromen-6-ones in aqueous media under MWI
作者:Yan He、Xinying Zhang、Liangyan Cui、Jianji Wang、Xuesen Fan
DOI:10.1039/c2gc36379h
日期:——
6H-benzo[c]chromenes and 6H-benzo[c]chromen-8-ols via cascade reactions of 2-(2-(allyloxy)phenyl)furan and 2-(2-(prop-2-ynyloxy)phenyl)furan, featured with intramolecular Diels–Alder reactions of furan with unactivated alkene/alkyne in aqueous media under MWI, was developed. In addition, an environmentally friendly oxidation of 6H-benzo[c]chromenes into the corresponding benzo[c]chromen-6-ones using aqueous
在本文中, 催化剂不同地取代的6的-free合成ħ -苯并[ c ^ ]色烯和6 ħ -苯并[ c ^ ]苯并吡喃-8-醇通过的级联反应2-(2-(烯丙氧基)苯基)呋喃 和 2-(2-(丙-2-炔氧基)苯基)呋喃,具有分子内Diels–Alder反应 呋喃 与未激活 烯烃/炔烃在MWI下的水性介质中进行了开发。另外,环保氧化作用还揭示了在没有任何活化剂/催化剂的情况下,使用H 2 O 2作为氧化剂,将6 H-苯并[ c ]色烯转化为相应的苯并[ c ]色烯-6 。