Copper-catalyzed annulation of heteroaromatic β-halo-α,β-unsaturated carboxylic acids with alkynes for the synthesis of indolo[2,3-c]pyrane-1-ones and thieno[2,3-c]pyrane-7-ones
作者:Da-Wei Gu、Xun-Xiang Guo
DOI:10.1039/c4ob00996g
日期:——
heteroaromatic β-halo-α,β-unsaturated carboxylic acids with alkynes proceeds efficiently in the presence of Cu(OAc)2·H2O as a catalyst to afford the corresponding indolo[2,3-c]pyrane-1-ones and thieno[2,3-c]pyrane-7-ones in moderate to good yields. This strategy offers a simple and efficient route for the synthesis of indolo[2,3-c]pyrane-1-ones and thieno[2,3-c]pyrane-7-ones with good tolerance to a variety
在作为催化剂的Cu(OAc)2 ·H 2 O存在下,杂炔β-卤代-α,β-不饱和羧酸与炔烃的环合反应有效进行,得到相应的吲哚[2,3 - c ]吡喃-1 -ones和thieno [2,3 - c ] pyrane-7-ones,产量中等至良好。该策略为吲哚[2,3 - c ]吡喃-1-酮和噻吩并[2,3 - c ]吡喃-7-酮的合成提供了简单有效的途径,该化合物对各种官能团具有良好的耐受性。可用的杂芳族β-卤代-α,β-不饱和羧酸。