Author/Authors :
Yoshimi، نويسنده , , Yasuharu and Kanai، نويسنده , , Hirotomo and Nishikawa، نويسنده , , Keisuke and Ohta، نويسنده , , Yasushi and Okita، نويسنده , , Yoshiki and Maeda، نويسنده , , Kousuke and Morita، نويسنده , , Toshio، نويسنده ,
Abstract :
Tin-free, photoinduced electron transfer promoted reductive radical cyclization reactions of allyl 2-bromoaryl ethers in the presence of NaOH in 2-PrOH were found to take place efficiently to give 3-methyl-2,3-dihydrobenzofurans. In contrast to conventional radical cyclization reactions that employ AIBN/Bu3SnH in benzene, the new method utilizes NaOH and 2-PrOH that are both readily available and benign. Consequently, the newly developed photochemical process serves as a versatile and environmentally friendly method for carrying out aryl radical cyclization reactions.
Keywords :
Allyl 2-bromoaryl ether , Tin-free reductive radical cyclization reaction , Photoreaction , Electron transfer
