Base‐Promoted Aerobic Oxidation/Homolytic Aromatic Substitution Cascade toward the Synthesis of Phenanthridines
作者:Debabrata Maiti、Atreyee Halder、Suman De Sarkar
DOI:10.1002/adsc.201900995
日期:2019.11.5
transition metal‐free synthesis of polysubstituted phenanthridines from abundant starting materials like benzhydrol and 2‐iodoaniline derivatives. The reaction involves sequential oxidation of alcohol and direct condensation reaction with the amine resulting in a C−N bond formation followed by a radical C−C coupling in a cascade sequence. The used base potassium tert‐butoxide plays a dual role in dehydrogenation
A photocatalyst-free method for the synthesis of 6-alkyl(aryl)phenanthridines under visible light irradiation
作者:Palani Natarajan、Partigya、Pooja
DOI:10.1039/d2nj04414e
日期:——
developed to synthesize a number of 6-alkyl(aryl)phenanthridines from isocyanobiaryls and alkyl(aryl)sulfinates in ethyl lactate under aerobic conditions. This protocol did not require a photoredox catalyst, and the reaction was sparked by the photochemical activity of an electron donor–acceptor complex formed by the interaction of isocyanobiaryls with alkyl(aryl)sulfinates. The environmental friendliness
已开发出一种新颖有效的蓝色 LED 诱导方法,可在有氧条件下从乳酸乙酯中的异氰基联芳基和烷基(芳基)亚磺酸盐合成许多 6-烷基(芳基)菲啶。该方案不需要光氧化还原催化剂,反应是由异氰基联芳基与烷基(芳基)亚磺酸盐相互作用形成的电子供体-受体复合物的光化学活性引发的。环境友好、温和、克级可合成性、不含有毒有机溶剂/添加剂以及不含过渡金属只是该方法的几个显着优势。
Intramolecular Direct C–H Bond Arylation from Aryl Chlorides: A Transition-Metal-Free Approach for Facile Access of Phenanthridines
作者:Yinuo Wu、Shun Man Wong、Fei Mao、Tek Long Chan、Fuk Yee Kwong
DOI:10.1021/ol302489n
日期:2012.10.19
A C-H arylation with aryl chloride Is made viable through a transition-metal-free approach. In the presence of a simple diol associating with KOt-Bu, various phenanthridine derivatives can be conveniently accessed. In particular, only 10 mol % of simple and inexpensive ethylene glycol is required for this protocol. These results represent the first general examples of aryl chloride/C-H coupling under transition-metal-free conditions.
Visible light-induced reductive aza-6π electrocyclization access to phenanthridines
A simple, efficient, green method for constructing substituted phenanthridine with nitroaromatic hydrocarbons and aromatic aldehydes and alkyl aldehydes under visible light.