A couple of challenges comes to mind: improving temperature dependence of relative stabilities of polymorphs would help in identifying enantiotropic relationships. 3340-78-1, Name is 2-Phenyl-1,2,3,4-tetrahydroisoquinoline, molecular formula is C15H15N. 3340-78-1
The ruthenium carbamate complex derived from 3-trimethoxysilyl-1-propyl amine and carbon dioxide was found to be a novel catalyst for the oxidative cyanation of aromatic and cyclic tertiary amines to corresponding alpha-amino nitriles in high to excellent yields by using hydrogen peroxide and molecular oxygen as enviro-economic oxidants. The developed protocol suggested an efficient alternative for recycling carbon dioxide.
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Reference：
Tetrahydroisoquinoline – Wikipedia,
1,2,3,4-Tetrahydroisoquinoline | C9H11N – PubChem