反应详情

Following the procedure as described in PREPARATION 31D, and making non-critical variations to replace 1-hexyl-3-(6-hydroxy-1,3-benzodioxol-5-yl)-1,3-dihydro-2H-indol-2-one with 4-bromo-3-(6-hydroxy-2,3-dihydro-1-benzofuran-5-yl)-1,3-dihydro-2H-indol-2-one, and ethyl bromoacetate with para-formaldehyde, the title compound was obtained that was used directly for further reaction.