Two become one: A general catalytic hydrogen transfer-mediated α-functionalization of 1,8-naphthyridines is reported for the first time. The pyridyl α-site selectively couples with the C8-site of various tetrahydroquinolines to afford novel tetrahydro-1,8-naphthyridines (see scheme). The reaction features operational simplicity, a readily available catalyst and good functional group tolerance.
Through cooperative actions of iridium catalyst and NaOTf additive we report a new direct access to nitrogen bi-heteroarenes via hydrogen-evolution cross-coupling of the β-site of indoles/pyrrole with the α-site of N-heteroarenes. The reaction proceeds in an atom- and redox-economic fashion together with the merits of an easily available catalyst system, broad substrate scope, excellent functional
A practical approach to the direct α-methylation of 1,8-naphthyridines under mild reaction conditions has been developed using simple and readily available DMSO as a convenient and environmentally friendly carbon source.
simplicity, a readily available catalyst system, excellent functional group tolerance, and exclusive regioselectivity, which offers a significant basis to access novel aniline derivatives that are currently inaccessible or challenging to prepare with conventional approaches, and design new coupling reactions via a hydrogen transfer strategy.