Mechanistic Studies of the Copper-Catalyzed Electrophilic Amination of Diorganozinc Reagents and Development of a Zinc-Free Protocol
作者:Matthew J. Campbell、Jeffrey S. Johnson
DOI:10.1021/ol0702829
日期:2007.4.1
mechanism for the copper-catalyzed amination of diorganozincreagents by O-benzoyl-N,N-dialkylhydroxylamines is supported by following stereochemically defined organometallics through the reaction and by employing the endocyclic restriction test. A copper-catalyzed electrophilic amination of organomagnesium compounds is also described in which the use of zinc halides has been eliminated.
Unexpected C−C Bond Cleavage and C−C Bond Formation Observed in the Reaction of a Cationic Iridium Complex with Heteroatom-Substituted Cyclopropanes
作者:Mitchell R. Anstey、Cathleen M. Yung、Juana Du、Robert G. Bergman
DOI:10.1021/ja068312a
日期:2007.1.1
[Cp*(PMe3)Ir(η3-C3H4CH3)][OTf] (8) and the corresponding amine or alcohol. The methyl group initially bound to iridium is no longer extruded as methane, but instead is incorporated into the allyl moiety to give a new carbon−carbon bond. A detailed mechanistic study provides evidence in support of an initial C−C bond activation mechanism as opposed to the initial C−H bond activation observed with other known
Direct Reductive Amination of Carbonyl Compounds with H
<sub>2</sub>
Using Heterogeneous Catalysts in Continuous Flow as an Alternative to N‐Alkylation with Alkyl Halides
作者:Benjamin Laroche、Haruro Ishitani、Shū Kobayashi
DOI:10.1002/adsc.201801457
日期:2018.12.21
continuous‐flow procedure for direct reductive amination of secondary and primary amines with aromatic and aliphatic aldehydes as well as ketones is reported. The use of hydrogen gas and commercially available Pt/C as a heterogeneous catalyst is a key. In addition to exhibiting an excellent functional group tolerance, this method allows the fast formation of C−N bonds without production of any hazardous
A pyrazolone derivative represented by formula (I) below:
wherein R
1
to R
3
are the same as defined in claims; or an optical isomer, a pharmaceutically acceptable salt thereof, or a hydrate or solvate thereof is provided. The novel pyrazolone derivative according to the present invention has a PAI-1 production inhibitory activity, a tissue fibrosis inhibitory activity, and a fibrolytic activity, and is effective for preventing and/or treating tissue fibrotic diseases (lung fibrosis, kidney fibrosis, etc.) and diseases of which a pathological thrombus becomes the cause, such as ischemic cardiac diseases (cardiac infarction and angina pectoris), atrial thrombus, lung embolism, deep thrombophlebitis, disseminated intravascular clotting, ischemic brain diseases (brain infarction, brain hemorrhage), and arterial sclerosis. In addition, a pharmaceutical agent for preventing and/or treating the disease conditions or the symptoms mediated by plasminogen activator inhibitor-1, comprising the novel pyrazolone derivative according to the present invention is also provided.
作者:Qing Wang、Xiangzhang Tao、Shengyang Ni、Yi Pan、Yi Wang
DOI:10.1021/acs.orglett.3c02082
日期:2023.8.11
establishing C(sp3)–N bonds from alkyl substrates in cross-couplingchemistry using palladium and nickel catalysts. Therefore, the methods of constructing C(sp3)–N bonds remain rare from alkyl electrophiles. The existing routes are limited to copper catalysis and photoredox catalysis. Here, we demonstrate an alternative amination strategy for rapid construction of C(sp3)–N bonds from accessible alkyl electrophiles
双分子亲核取代S N 2 是烷基亲电试剂胺化最早也是最重要的手段;其实际应用很大程度上限于初级或活化基质。此外,持续的挑战在于使用钯和镍催化剂在交叉偶联化学中从烷基底物建立C(sp 3 )–N键。因此,从烷基亲电子试剂构建C(sp 3 )–N键的方法仍然很少。现有的路线仅限于铜催化和光氧化还原催化。在这里,我们展示了一种替代的胺化策略,用于从可接近的烷基亲电子试剂中快速构建 C(sp 3 )–N 键,该策略在镍催化下通过 Ni (III) 物种高效还原消除用作自由基前体。