Sulfuric Acid → HCID 68122489, compound

Participants

Reaction Steps

To 10 parts of concentrated sulfuric acid, with vigorous agitation at 0°, is slowly added 1 part of (Z)-2-cyclopropylcarbonyl-1,2,3,4-tetrahydro-6,7-dimethoxy1-[(3,4-dimethoxyphenyl)methylene]isoquinoline. When the addition is complete, 90 parts of water is mixed in; and the yellow precipitate which forms is isolated by filtration and recrystallized from water, affording 8-cyclopropyl5,6-dihydro-2,3,10,11-tetramethoxydibenzo[a,g]quinolizinium hydrogen sulfate melting above 300°.

Provenance & Evidence