Rh(<scp>iii</scp>)-Catalyzed three-component cascade annulation to produce the <i>N</i>-oxopropyl chain of isoquinolone derivatives
作者:Yuan He、Xian-Zhang Liao、Lin Dong、Fen-Er Chen
DOI:10.1039/d0ob02389b
日期:——
versatile functional groups at the N-substituents of isoquinolone scaffolds is still a great challenge. Herein, we report a novel three-component cascade annulation reaction to efficiently construct the N-oxopropyl chain of isoquinolone derivatives via rhodium(III)-catalyzed C–H activation/cyclization/nucleophilic attack, with oxazoles used both as the directing group and potential functionalized reagents
Iodine-promoted cyclization of N-propynyl amides and N-allyl amides via sulfonylation and sulfenylation
作者:Gopal Chandru Senadi、Bing-Chun Guo、Wan-Ping Hu、Jeh-Jeng Wang
DOI:10.1039/c6cc05138c
日期:——
Iodine-promoted sulfonylation of N-propynyl amides with sulfonyl hydrazides followed by DBU mediated cyclisation to afford 5-methyl-arylsulfonyloxazoles and oxysulfenylation of N-allyl amides through electrophilic addition of in situ generated sulfenyl iodide...
Synthesis of 2,2,2‐Trifluoroethyl Oxazoles, Oxazolines and Furans via Alkyne Oxytrifluoromethylation
作者:Jia‐Jia Dong、Song‐Lin Zhang
DOI:10.1002/adsc.201901405
日期:2020.2.21
This study reports an oxytrifluoromethylation method for construction of oxazoles and furans motif and the concurrent incorporation of a 2,2,2‐trifluoroethyl group at the aromatic C5‐position. High‐valent copper(III) trifluoromethyl compounds are crucial to this reaction that induces oxy‐trifluoromethylation of alkynes with a pendant amide/enol group functioning as the oxygen‐nucleophile. A wide substrate
Dual hydrogen bond donation, one from side-arm amide, and another from substrate or acid additive, enables Au(i)–Cl bond activation and gold(i)-catalysis.
Base-controlled highly selective synthesis of alkyl 1,2-bis(boronates) or 1,1,2-tris(boronates) from terminal alkynes
作者:Guoliang Gao、Jianxiang Yan、Kai Yang、Fener Chen、Qiuling Song
DOI:10.1039/c7gc01161j
日期:——
highly regioselective synthesis of alkyl 1,2-bis(boronates) or 1,1,2-tris(boronates) from various terminalalkynes has been disclosed. These reactions are efficient, practical and mild with good regioselectivity, excellent functional group tolerance as well as good scalability, which provide general and complementary methods to access multiborylated alkanes from various terminalalkynes.