Sequential alkylation/cyclization/isomerization of ethyl 3-(o-trifluoroacetamidoaryl)-1-propargylic esters: a new route to 2-acyl- and 2-ethoxycarbonyl-3-alkenyl indoles
The reaction of ethyl 3-(o-trifluoroacetamidoaryl)-1-propargylic esters with ethyl iodoacetate or α-bromoacetophenone in the presence of K2CO3 in DMSO provides a new simple access to 2-acyl- and 2-ethoxycarbonyl-3-alkenyl indoles.
3-(邻-三氟乙酰胺基芳基)-1-丙酸酯与碘乙酸乙酯或α-溴乙酰苯的反应在DMSO中K 2 CO 3的存在下提供了新的简单途径获得2-酰基-和2-乙氧基羰基-3-烯基吲哚。