In heterogeneous catalysis, the catalyst is in a different phase from the reactants. Application In Synthesis of 6,7-Dimethoxy-1,2,3,4-tetrahydroisoquinoline, At least one of the reactants interacts with the solid surface in a physical process called adsorption in such a way. 1745-07-9, name is 6,7-Dimethoxy-1,2,3,4-tetrahydroisoquinoline. In an article，Which mentioned a new discovery about 1745-07-9
ASSIGNMENTS OF 1H AND 13C NMR RESONANCES OF SOME ISOQUINOLINE ALKALOIDS
Aided by model compounds, lanthanide-induced chemical shifts (LIS) and 2D NMR, the assignment of 1H and 13C NMR resonances of several isoquinoline alkaloids is discussed and demonstrated.The results obtained necessitate a reversal of many 13C NMR assignments reported in the literature.LIS constitutes a valuble tool in assigning NMR resonances and is complementary to other techniques used for this purpose.For beta-narcotine it also provides information on the topology of the compound in solution.The spectra of several isoquinoline alkaloids having different structural skeletons are described.These compounds may serve as model compounds in assigning resonances of related alkaloids.
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Reference：
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem