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.
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.
Reductive functionalization of N-heteroarenes remains to date a challenge due to the easy occurrence of direct reduction of such substances into non-coupling saturated cyclic amines. Herein, by developing an unprecedented manganese catalyst ligating with an unsymmetrical 2-aminotetrahydronaphthyridyl PNP-ligand, we have achieved a new reductive cross-coupling of indoles/pyrroles and N-heteroarenes
Photoinduced Silylation of <i>N</i>-Heteroarenes and Unsaturated Benzamides with Naphthalimide-Based Organic Photocatalysts
作者:Wenjuan Zhang、Qi Lu、Mengshi Wang、Yongjin Zhang、Xiao-Feng Xia、Dawei Wang
DOI:10.1021/acs.orglett.2c01330
日期:2022.6.3
general strategy for the silylation of N-heteroaromatics and unsaturated benzamides via the rational designing of an efficient organic photocatalyst. The process features operational simplicity, mild reaction conditions, and the use of readily prepared naphthalimide (NI)-based organic photocatalysts. Notably, both inert trialkylhydrosilanes and arylhydrosilanes are well tolerated with this protocol.