Nickel-Catalyzed Enantioselective α-Alkenylation of <i>N</i>-Sulfonyl Amines: Modular Access to Chiral α-Branched Amines
作者:Lun Li、Yu-Cheng Liu、Hang Shi
DOI:10.1021/jacs.1c00622
日期:2021.3.24
α-branched amines are common structural motifs in functional materials, pharmaceuticals, and chiral catalysts. Therefore, developing efficient methods for preparing compounds with these privileged scaffolds is an important endeavor in synthetic chemistry. Herein, we describe an atom-economical, modular method for a nickel-catalyzed enantioselective α-alkenylation of readily available linear N-sulfonyl amines
Pharmaceutical compositions containing 3-aminoazetidine derivatives, novel derivatives and their preparation
申请人:——
公开号:US20020019383A1
公开(公告)日:2002-02-14
The present invention relates to pharmaceutical compositions containing, as active ingredient, a compound of formula:
1
in which R
1
represents a radical —NHCOR
4
or —N(R
5
)—Y—R
6
, Y is CO or SO
2
, R
4
represents a radical -alk-SO
2
—R
11
, -alk-SO
2
—CH═CH—R
11
or Het substituted with —SO
2
—R
11
or a phenyl radical substituted with —SO
2
—R
11
or -alk-SO
2
—R
11
, R
5
represents a hydrogen atom or an alkyl radical, R6 represents a phenylalkyl, Het or Ar radical, to the novel derivatives of formula (I) and to their preparation.
One-pot reductive amination of carboxylic acids: a sustainable method for primary amine synthesis
作者:Robin Coeck、Dirk E. De Vos
DOI:10.1039/d0gc01441a
日期:——
carboxylic acids is a very green, efficient and sustainable method for the production of (bio-based) amines. However, with current technology, this reaction requires two to three reaction steps. Here, we report the first (heterogeneous) catalytic system for the one-pot reductive amination of carboxylic acids to amines, with solely H2 and NH3 as the reactants. This reaction can be performed with relatively cheap
N-heterocyclic compounds that block cytokine production via inhibition of p38 kinase are disclosed. In one embodiment, compounds of the present invention are represented by Formula I:
1
Methods of production, pharmaceutical compositions and methods of treating conditions associated with inappropriate p38 kinase activity or TNF-&agr; expression utilizing compounds of the present invention are also disclosed.
抑制 p38 激酶从而阻断细胞因子产生的 N-杂环化合物已被披露。在一种实施例中,本发明的化合物由式 I 表示。还披露了利用本发明化合物的生产方法、药物组合物以及治疗与不当 p38 激酶活性或 TNF-α 表达相关的疾病的方法。
Copper-catalyzed remote (δ) C(sp<sup>3</sup>)–H bond amination: a practical strategy to construct pyrrolidine derivatives
作者:Dongmei Meng、Yongzhen Tang、Junfa Wei、Xianying Shi、Mingyu Yang
DOI:10.1039/c7cc02624b
日期:——
We report a copper-catalyzed remote C(sp3)–H bond amination reaction that converts acyclic amines to pyrrolidines. This reaction occurs selectively at the carbon δ to the amine functionality. Primary, secondary and tertiary C–H bonds are all suitable for the amination reactions in the presence of an inexpensive and commercially available copper catalyst.