Solvent/Oxidant-Switchable Synthesis of Multisubstituted Quinazolines and Benzimidazoles via Metal-Free Selective Oxidative Annulation of Arylamidines
摘要:
A fast and simple divergent synthesis of multisubstituted quinazolines and benzimidazoles was developed from readily available amidines, via iodine(III)-promoted oxidative C(sp(3))-C(sp(2)) and C(sp(2))-N bond formation in nonpolar and polar solvents, respectively. Further selective synthesis of quinazolines in polar solvent was realized by TEMPO-catalyzed sp(3)C-H/sp(2)C-H direct coupling of the amidine with K2S2O8 as the oxidant. No metal, base, or other additives were needed.
METHOD FOR THE CATALYTIC REDUCTION OF ACID CHLORIDES AND IMIDOYL CHLORIDES
申请人:Nikonov Georgii
公开号:US20140228579A1
公开(公告)日:2014-08-14
The present application relates to methods for the catalytic reduction of acid chlorides and/or imidoyl chlorides. The methods comprise reacting the acid chloride or imidoyl chloride with a silane reducing agent in the presence of a catalyst such as [Cp(Pr
i
3
P)Ru(NCMe)
2
]
+
[PF
6
]
−
.
Onys'ko; Kim; Kiseleva, Russian Journal of General Chemistry, 1996, vol. 66, # 6, p. 911 - 916
作者:Onys'ko、Kim、Kiseleva、Sinitsa
DOI:——
日期:——
Semi-catalytic reduction of secondary amides to imines and aldehydes
作者:Sun-Hwa Lee、Georgii I. Nikonov
DOI:10.1039/c4dt00372a
日期:——
Ruthenium catalyzed reduction of iminoyl chlorides by HSiMe2Ph allows for a two-step conversion of secondary amides into imines and aldehydes.
钌催化的HSiMe2Ph还原亚胺酰氯,实现了将二级酰胺转化为亚胺和醛的两步反应。
Solvent/Oxidant-Switchable Synthesis of Multisubstituted Quinazolines and Benzimidazoles via Metal-Free Selective Oxidative Annulation of Arylamidines
作者:Jian-Ping Lin、Feng-Hua Zhang、Ya-Qiu Long
DOI:10.1021/ol500864r
日期:2014.6.6
A fast and simple divergent synthesis of multisubstituted quinazolines and benzimidazoles was developed from readily available amidines, via iodine(III)-promoted oxidative C(sp(3))-C(sp(2)) and C(sp(2))-N bond formation in nonpolar and polar solvents, respectively. Further selective synthesis of quinazolines in polar solvent was realized by TEMPO-catalyzed sp(3)C-H/sp(2)C-H direct coupling of the amidine with K2S2O8 as the oxidant. No metal, base, or other additives were needed.