反应详情

A sample of 6,7-dihydrobenzo[b]thiophene is stirred in the cold in 96% sulfuric acid containing 4-6 mole equivalents of urea. After 1 hour the mixture is poured on ice and the organic phase is removed. Evaporation of the organic phase to dryness in vacuo affords 4,5,6,7-tetrahydrobenzo[b]thien-4-ylurea.

1. additionAfter 1 hour the mixture is poured on ice
2. customthe organic phase is removed
3. customEvaporation of the organic phase to dryness in vacuo