甲醇 、
(1S,6R)-6-[(3-methoxycarbonyl-5,6,7,8-tetrahydro-4H-cyclohepta[b]thiophen-2-yl)carbamoyl]cyclohex-3-ene-1-carboxylic acid 在
硫酸 作用下,
以57 %的产率得到methyl 2-[6-(methoxycarbonyl)cyclohex-3-ene-1-amido]-4H,5H,6H,7H,8H-cyclohepta[b]thiophene-3-carboxylate