反应详情

Scheme 7 shows a general method for substitution at the 2-position of 4,5-dihydrobenzo[b]thieno[2,3-d]oxepine intermediates 74 by acylation with a carboxylic acid such as 2-phenylacetic acid to give 1-(4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-2-yl)-2-phenylethanone intermediate 81. Bromination gives 2-bromo-1-(4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-2-yl)-2-phenylethanone intermediate 82. Cyclization with a thioamide compound gives 4-(4,5-dihydrobenzo[b]thieno[2,3-d]oxepin-2-yl)-5-phenylthiazole 83.