报道了氟代烷基半缩醛与酮的一般有机催化不对称脱水曼尼希反应。在该曼尼希反应中,以前较少探索的芳基酮显示出很高的反应活性。通过这种有效的方法,直接获得了广泛的生物活性β-氨基酮。更重要的是,通过19 F NMR和HRMS分析检测并鉴定了参与反应的两种不同中间体。此外,通过生物活性的氟烷基β-氨基醇的合成证明了产物的合成效用。
Modulators of the Cystic Fibrosis Transmembrane Conductance Regulator Protein and Methods of Use
申请人:AbbVie S.à.r.l.
公开号:US20190077784A1
公开(公告)日:2019-03-14
The invention discloses compounds of Formula (I),
wherein A
1
, R
1
, R
2
, R
3
, R
4
, and n are as defined herein. The present invention relates to compounds and their use in the treatment of cystic fibrosis, methods for their production, pharmaceutical compositions comprising the same, and methods of treating cystic fibrosis by administering a compound of the invention.
enantioselectivity of the products. Also, several chiral ligands for Sharpless asymmetric oxidation reaction were evaluated to improve the enantioselectivity. Graphic abstract High enantioselectivity of ortho-alkoxy aryl chiral sulfoxides have been achieved by Sharpless oxidation reaction using Ti(O-i-Pr)4 and diethyl tartrate under anhydrous condition. In particular, the enantioselctivity of products was influenced
The search for novel K+ channelopeners with a non-benzopyran skeleton, unlike cromakalim, led to the discovery of a new series of (Z)-2-(alpha-alkoxyimino)benzylpryridine derivatives. Synthesis was achieved by using a (Z)-dominant condensation reaction of benzoylpyridines with O-alkylhydroxylamines, followed by m-chloroperbenzoic acid (m-CPBA) oxidation. The compounds were tested for their vasorelaxant
Rapid and versatile access to (Z)‐trisubstituted olefins 2 and their cyclization into 4‐aryl‐2H‐chromenes 1 starting fromarylalkynes 3 is described. In a one‐pot fashion, alkynes 3 were first hydrated, then transformed into N‐tosylhydrazones, and finally coupled with ortho‐substituted aryl halides under palladium catalysis to give trisubstituted olefins 2 in good yields and very high to total Z selectivity
Rhodium(II)-Catalyzed Aryl C−H Carboxylation of 2-Pyridylphenols with CO<sub>2</sub>
作者:Zhihua Cai、Shangda Li、Yuzhen Gao、Gang Li
DOI:10.1002/adsc.201800611
日期:2018.10.18
A protocol for C−H carboxylation of electron‐deficient 2‐pyridylphenols with CO2 through a Rh(II)‐catalyzed C−H bond activation under redox‐neutral conditions has been developed. A suitable phosphine ligand was crucial for this reaction. This method provided, in generally high yields, an access to a class of pyrido‐coumarins that are key structural motifs in biologically important molecules. Facile