However, translating this information to a non-biological catalyst is a challenging task. Here, we report a simple and scalable electrostatically tuned phenol (ETP) as an organocatalyst for transferhydrogenation of N-arenes using the Hantzsch ester as a hydride source. The biomimetic catalyst (1–5 mol%) displays potential catalytic activity to prepare diverse tetrahydroquinoline derivatives with good
The possibility was revealed for exhaustive protonation of 2,4-di-tert-butyl-6-dimethylamino-methylphenol with participation of one electron pairs on both nitrogen and oxygen atoms. The reaction of the title compound with alkyl halides includes concurrent and consecutive processes leading to formation of the corresponding hydrohalides and quaternization products. The latter undergo spontaneous oxidation with atmospheric oxygen to give quaternary 6,8-di-tert-butyl-3-methyl-2H-3,4-dihydro-1,3-benzoxazine derivatives which were detected by H-1 NMR spectroscopy.
Modular synthesis of spirocyclic carbonates: unravelling the synergistic interplay of electronic and electrostatic sites on phenolic catalyst
Spirocyclic carbonates: A simple and efficient organocatalytic approach for the chemical fixation of CO2 with spiroepoxy oxindoles has been demonstrated. The catalytic protocol may provide additional possibilities to new applications.