反应详情

A 1.2 g quantity of 3-hexyl-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-2,4(1H,3H)-dione (Compound III-9), 0.14 g of 50% sodium hydride and 1.0 g of ethyl bromoacetate were allowed to react with each other in the same manner as in Reference Example 5. The residue obtained by concentration was subjected to silica gel column chromatography using chloroform as an eluent. Then 1.2 g of 1-ethoxycarbonylmethyl-3-hexyl-5,6,7,8-tetrahydrobenzothieno[2,3-d]pyrimidin-2,4(1H,3H)-dione was obtained in a yield of 77%.

1. customto react with each other in the same manner as in Reference Example 5
2. customThe residue obtained by concentration