and aldehyde) in the C5 position with excellent regioselectivity (C5/others >20:1). Moreover, this protocol is also suitable for polycyclic aromatichydrocarbons and the more remote C8 position. Preliminary mechanistic studies show that the tertiary phosphine group plays two essential roles in the reaction: first, it assists the introduction of Ru–C bond at the C8 position; second, due to the induction
α-Bromoamides and styrenes underwent iminolactonization reactions (carbooxygenation), in which simultaneous C–C and C–O formation occurred in the presence of a copper catalyst with triethylamine as the base. Conversely, olefinationreactions occurred in the presence of a Cu catalyst with piperidine as the base. The selectivities in those reactions were very high.
The present invention relates to a core-shell nanoparticle comprising (a) an inorganic core comprising a nanoparticle comprising a metal, a metal oxide or combination thereof, and a silica component; (b) a shell material comprising a copolymer having at least two polymers selected from a pH-responsive polymer and a hydrophobic polymer; and (c) a crosslinker that conjugates the shell material to the inorganic core. There is also provided a method for producing the core-shell nanoparticle and uses thereof.
Visible-Light-Driven Aryl Migration and Cyclization of α-Azido Amides
i-Pr2NEt as the reducing agent, N-aryl α-azido tertiary amides were first converted to the corresponding aminyl radicals through reduction of the azido group; the aminyl radicals then underwent N-to-N arylmigration to give α-anilinyl-functionalized amides. α-Azido secondary amides, on the other hand, reacted with the solvent ethanol and i-Pr2NEt to afford the imidazolinone products.
本文报道了 α-叠氮酰胺的两种新的可见光促进自由基反应。通过以i- Pr 2 NEt为还原剂催化[Ir(ppy) 2 (dtbbpy)]PF 6,N-芳基α-叠氮叔酰胺首先通过叠氮基的还原转化为相应的胺基;然后氨基自由基经历 N 到 N 芳基迁移,得到 α-苯胺基官能化的酰胺。另一方面,α-叠氮仲酰胺与溶剂乙醇和i- Pr 2 NEt 反应得到咪唑啉酮产物。