Efficient approach to allylated quinolines via palladium-catalyzed cyclization–allylation of 1-azido-2-(2-propynyl) benzenes with allyl methyl carbonate
作者:Jiang Luo、Zhibao Huo、Jun Fu、Fangming Jin、Yoshinori Yamamoto
DOI:10.1016/j.tetlet.2014.01.068
日期:2014.2
The palladium-catalyzed cyclization-allylation reaction of ortho-azido propynylbenzenes 1 and ally' methyl carbonate 2d gives the corresponding allylated quinolines in moderate to good yields. The reaction of 1-azido-2-(2-propynyl)benzene la proceeds smoothly with 10 mol % Pd(PPh3)(4) and 5 equiv K3PO4 or NaOAc in DMF at 100 degrees C to afford 3,4-diallylquinoline 3a in 69% yield in the case of R-2 = H and 3-allylquinoline 4 in 67% yield in the case of R-2 not equal H. (C) 2014 Elsevier Ltd. All rights reserved.