Palladium-catalyzed cyclization reactions of propargylic carbonates with nucleophiles: a methodology for the syntheses of substituted 2,3-dihydrofurans and benzofurans
作者:Masahiro Yoshida、Yukio Morishita、Mika Fujita、Masataka Ihara
DOI:10.1016/j.tet.2005.02.077
日期:2005.5
by the palladium-catalyzed reaction of 5-methoxycarbonyloxy-3-pentyn-1-ol with phenols. The propargylic carbonate containing a nucleophilic phenoxy group also reacted in the presence of palladium to produce the product. The reaction of 1-(2-hydroxyphenyl)-3-methoxycarbonyloxy-1-propyne with 2-methyl-1,3-cyclohexanedione or 2-methyl-1,3-cycohexanedione yielded the substituted benzofurans. The propargylic
通过钯催化5-甲氧基羰基氧基-3-戊炔-1-醇与酚的反应,合成了苯氧基取代的2,3-二氢呋喃。含有亲核苯氧基的碳酸炔丙酯也可在钯存在下反应生成产物。1-(2-羟基苯基)-3-甲氧基羰氧基-1-丙炔与2-甲基-1,3-环己二酮或2-甲基-1,3-环己二酮的反应产生了取代的苯并呋喃。具有乙酰氧基作为离去基团的炔丙基化合物表现出相似的反应性。