Iridium(III)-Catalyzed Selective and Mild C-H Amidation of Cyclic <i>N</i>
-Sulfonyl Ketimines with Organic Azides
作者:Manikantha Maraswami、Gang Chen、Teck-Peng Loh
DOI:10.1002/adsc.201700785
日期:2018.2.1
A general protocol for iridium catalyzed direct C−H amidation of cyclic N-sulfonyl ketimines using sulfonyl, acyl and arylazides as nitrogen source is reported herein. The reaction takes place at roomtemperature with acyl and arylazides, while an elevated temperature needed with sulfonylazides to furnish aminated sultams in excellent yields with complete chemo and regioselectivity, thus providing
Cu(OAc)<sub>2</sub>-Promoted Ortho C(sp<sup>2</sup>)–H Amidation of 8-Aminoquinoline Benzamide with Acyl Azide: Selective Formation of Aroyl or Acetyl Amide Based on Catalyst Loading
作者:Tubai Ghosh、Pintu Maity、Brindaban C. Ranu
DOI:10.1021/acs.joc.8b01654
日期:2018.10.5
An efficient method for the C(sp2) amidation of 8-aminoquinoline benzamide by acyl azide in the presence of copper acetate has been achieved via C–H activation. Interestingly, the loading of copper acetate has a strong influence on the outcome of the reaction. The use of 1 equiv of copper acetate produces the corresponding aroyl amide, whereas the use of 2 equiv led to acetyl amide. A series of substituted
Ir<sup>III</sup>-Catalyzed Direct C-7 Amidation of Indolines with Sulfonyl, Acyl, and Aryl Azides at Room Temperature
作者:Wei Hou、Yaxi Yang、Wen Ai、Yunxiang Wu、Xuan Wang、Bing Zhou、Yuanchao Li
DOI:10.1002/ejoc.201403355
日期:2015.1
procedure for an IrIII-catalyzedC-7 selective C–H amidation and amination of indolines is reported. The reaction exhibits good functional group tolerance, requires no external oxidants, and releases N2 as the single byproduct, thus providing an environmentally benign, readily scalable method for the synthesis of 7-aminoindolines. More importantly, acyl, sulfonyl, and arylazides can be employed as
Ru
<sup>V</sup>
‐Acylimido Intermediate in [Ru
<sup>IV</sup>
(Por)Cl
<sub>2</sub>
]‐Catalyzed C–N Bond Formation: Spectroscopic Characterization, Reactivity, and Catalytic Reactions
作者:Dan‐Yan Hong、Yungen Liu、Liangliang Wu、Vanessa Kar‐Yan Lo、Patrick H. Toy、Siu‐Man Law、Jie‐Sheng Huang、Chi‐Ming Che
DOI:10.1002/anie.202100668
日期:2021.8.16
bond formationreactions via acylnitrene transfer have recently attracted much attention, but direct detection of the proposed acylnitrenoid/acylimido M(NCOR) (R=aryl or alkyl) species in these reactions poses a formidable challenge. Herein, we report on Ru(NCOR) intermediates in C−N bond formation catalyzed by [RuIV(Por)Cl2]/N3COR, a catalytic method applicable to aziridine/oxazoline formation from
A mild and selective Cu(II) salts-catalyzed reduction of nitro, azo, azoxy, <i>N</i>-aryl hydroxylamine, nitroso, acid halide, ester, and azide compounds using hydrogen surrogacy of sodium borohydride
作者:Anirudhdha G. Kalola、Pratibha Prasad、Jaydeep A. Mokariya、Manish P. Patel
DOI:10.1080/00397911.2021.1983604
日期:2021.12.2
salt-based catalyst system utilizing the hydrogen surrogacy of sodiumborohydride for selective hydrogenation of a broad range of nitro substrates into the corresponding amine under habitancy of water or methanol like green solvents have been described. Moreover, this catalytic system can also activate various functional groups for hydride reduction within prompted time, with low catalyst-loading, without
摘要 第一个温和、原位、单锅、高收率、筛选良好的铜 (II) 盐基催化剂体系,利用硼氢化钠的氢替代作用,在存在于已经描述了水或甲醇之类的绿色溶剂。此外,该催化体系还可以在短时间内活化各种官能团进行氢化物还原,催化剂负载量低,无需高压或分子氢供应。值得注意的是,该系统探索了替代昂贵的传统加氢方法的巨大潜力,从而在有机合成领域提供了一种更绿色、更简单的加氢策略。