4721-98-6, Name is 6,7-Dimethoxy-1-methyl-3,4-dihydroisoquinoline, belongs to isoquinoline compound, is a common compound. COA of Formula: C12H15NO2In an article, once mentioned the new application about 4721-98-6.
The reaction of 1-ethylidene-2-formyl-1,2,3,4-tetrahydroisoquinolines 4a and 4b, or 1-ethyl-3,4-dihydroisoquinolines 3a and 3b, with benzyne led, by a formal 3+2 cycloaddition, to dibenzindolizines 5a and 5b, respectively.Compound 5b was also synthesized by photocyclization of enamine 6.
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Reference：
Isoquinoline – Wikipedia,
Isoquinoline | C9H7N – PubChem