Electrochemical Decarboxylative Cyclization of α‐Amino‐Oxy Acids to Access Phenanthridine Derivatives
作者:Yanling Zhan、Changhui Dai、Zitong Zhu、Ping Liu、Peipei Sun
DOI:10.1002/asia.202101388
日期:2022.3.14
compounds found in pharmaceuticals and natural products. Herein, an efficient electrochemical decarboxylative cyclization of α-amino-oxy acids to synthesize phenanthridine derivatives was developed. This reaction proceeded through iminyl radical formation cascade intramolecular cyclization from readily available materials under transition-metal-free and mild conditions.
Phenanthridine Synthesis through Iron-Catalyzed Intramolecular <i>N</i>-Arylation of <i>O</i>-Acetyl Oxime
作者:Indubhusan Deb、Naohiko Yoshikai
DOI:10.1021/ol4020392
日期:2013.8.16
O-Acetyl oximes derived from 2′-arylacetophenones undergo N–O bond cleavage/intramolecular N-arylation in the presence of a catalytic amount of iron(III) acetylacetonate in acetic acid. In combination with the conventional cross-coupling or directed C–H arylation, the reaction offers a convenient route to substituted phenanthridines.
A binap-ligated copper dimer has been heterogenized on a pillar-layered MOF surface for the first time using a hydroxamic acid linker. This MOF-supported dimeric copper photocatalyst demonstrates much higher activity and recyclability than its homogeneous counterparts in intra- and intermolecular radicalreactions of N-acyloxy imidates and O-acyl oximes.
This study reported the synthesis of 6-methylphenanthridines from 2-isocyanobiaryls using dimethylformamide (DMF) as a methyl carbon souce. The reactions were conducted in open-air atmosphere using electrochemical process at ambient temperature.
AbstractThe di‐tert butyl peroxide (DTBP)‐promoted sequential reaction of isonitriles is developed, leading to 6‐methylphenanthridine derivatives in moderate to excellent yields. DTBP served as both promoter and methyl source. The procedure proceeds through the addition of a methyl radical derived from the peroxide to the isonitrile followed by aromatic homolytic cyclization. It tolerates a series of functional groups, such as fluoro, chloro, acetyl, methoxycarbonyl, cyano and trifluoromethyl.magnified image