反应详情

(i) To 1.15 g of (R)-(+)-N-acetyl-7,8-dihydroxy-4-(3,4-dihydroxyphenyl)-1,2,3,4-tetrahydroisoquinoline 1/4 hydrate were added 9 ml of 3N hydrochloric acid and 9 ml of ethanol, and the mixture was heated under an argon gas stream for 24 hours. After the reaction solution was cooled, the crystals which separated out were collected by filtration, affording 1.09 g of (R)-(+)-7,8-dihydroxy-4-(3,4-dihydroxyphenyl)-1,2,3,4-tetrahydroisoquinoline hydrochloride monohydrate.

1. temperaturethe mixture was heated under an argon gas stream for 24 hours
2. temperatureAfter the reaction solution was cooled
3. customthe crystals which separated out
4. filtrationwere collected by filtration