3-[(2E)-3-(5-bromo-2-thienyl)prop-2-enoyl]-4-hydroxy-6-methyl-2H-pyran-2-one 生成 3-[7-(5-bromo-thien-2-yl)-2,3,6,7-tetrahydro-[ 1,4]thiazepin-5-yl]-4-hydroxy-6-methyl-pyran-2-one 、 3-[7-(1-benzenesulfonyl-1H-pyrrol-2-yl)-2,3,6,7-tetrahydro-[1,4]thiazepin-5-yl]-4-hydroxy-6-methyl-pyran-2-one