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1745-07-9, An article , which mentions 1745-07-9, molecular formula is C11H15NO2. The compound – 6,7-Dimethoxy-1,2,3,4-tetrahydroisoquinoline played an important role in people’s production and life.

A Photochemical Route to the Protoberberine Skeleton

Irradiation of Mannich bases obtained from phtalimides, formaldehyde, and 1,2,3,4-tetrahydroisoquinolines and carrying methoxy or methylenedioxy substituents gave, in moderate yield, pentacyclic photoproducts.These underwent acid-promoted reaction leading to 13-hydroxydibenzoquinolizin-8-ones, one of which was 13-hydroxy-8-oxoxylopinine.Reduction to remove the 8,13 oxygenated functions was not achieved.Unsymmetrical substrates derived from 3,4-dimethoxyphtalimide gave a mixture of regio- and stereo-isomers in photocyclisation, with no strong preference for one orientation of reaction.

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Reference£º
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem