Chemistry is traditionally divided into organic and inorganic chemistry. name: 6,7-Dimethoxy-1,2,3,4-tetrahydroisoquinoline, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 1745-07-9
Eosin y catalyzed visible light oxidative C-C and C-P bond formation
Eosin Y catalyzes efficiently the visible light mediated coupling of sp3 C-H bonds adjacent to the nitrogen atom in tetrahydroisoquinoline derivatives in the absence of an external oxidant. Nitroalkanes, dialkyl malonates, malononitrile, and dialkyl phophonates were used as pronucleophiles in this metal-free, visible light oxidative coupling reaction.
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Reference：
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem