SUBSTITUTED PYRAZOLO[3,4-b]PYRIDIN-6-CARBOXYLIC ACIDS AND METHOD OF USE
申请人:AbbVie S.à.r.l.
公开号:US20170101406A1
公开(公告)日:2017-04-13
The present invention provides for compounds of formula (I)
wherein R
1
, R
2
, R
3
, and R
4
have any of the values defined in the specification, and pharmaceutically acceptable salts thereof, that are useful as agents in the treatment of diseases and conditions mediated and modulated by CFTR, including cystic fibrosis, Sjögren's syndrome, pancreatic insufficiency, chronic obstructive lung disease, and chronic obstructive airway disease. Also provided are pharmaceutical compositions comprised of one or more compounds of formula (I).
A novel and mild Rh(iii)-catalyzed C-H activation/intramolecular condensation of 1-aryl-1H-pyrazol-5-amines with cyclic 2-diazo-1,3-diketones was developed, givingaccess to various important benzo[f]pyrazolo[1,5-a][1,3]diazepine scaffolds through sequential C-C/C-N bond formation in a one-pot procedure under additive- and oxidant-free conditions. Furthermore, 3-([1,1'-biphenyl]-2-ylamino)-2-ethoxycyclohex-2-enones
Asymmetric [3 + 3] Annulation to Construct Trifluoromethylated Pyrazolo[3,4-<i>b</i>]pyridin-6-ones via Chiral Phosphoric Acid and MgSO<sub>4</sub> Synergistic Catalysis
作者:Alemayehu Gashaw Woldegiorgis、Zhao Han、Xufeng Lin
DOI:10.1021/acs.orglett.2c01513
日期:2022.6.10
and diastereoselectivesynthesis of pyrazolo[3,4-b]pyridin-6-ones bearing a −CF3 unit via synergistic chiral phosphoric acid and MgSO4 catalysis. This [3 + 3] annulation protocol allows the formation of trifluoromethylated pyrazolo[3,4-b]pyridin-6-ones with two adjacent tertiary stereocenters in moderate to high yields (up to 90%), enantioselectivities (up to 97% ee), and diastereoselectivities (up
我们开发了一种新颖的不对称 Friedel-Crafts 烷基化/转酰胺基串联反应,用于通过协同手性磷酸和 MgSO 4催化合成带有 -CF 3单元的吡唑并[3,4- b ]吡啶-6-酮的对映选择性和非对映选择性。这种 [3 + 3] 环化方案允许以中等至高产率(高达 90%)、对映选择性(高达 97% ee ) 和非对映选择性(高达 >20:1 dr)。
Transition-Metal-Free Dehydrogenation of Benzyl Alcohol for C–C and C–N Bond Formation for the Synthesis of Pyrazolo[3,4-<i>b</i>]pyridine and Pyrazoline Derivatives
electrocyclization, the aza-Diels–Alder reaction, and the formation of intramolecular C–N bonds. These positive outcomes would open up the possibility of producing biologically active pyrazolo[3,4-b]pyridine and pyrazoline derivatives through a variety of possible reactions.
已经开发了一系列级联反应,产生一系列具有吡唑/吡唑啉核的官能化芳族杂环化合物。该方法依赖于无金属脱氢过程来生产原位苯甲醛。然后让产生的苯甲醛与一些其他物质反应,包括苯乙酮、吡唑胺和苯肼。由这些底物产生的中间体经历了几个化学过程,包括电环化、aza-Diels-Alder 反应和分子内 C-N 键的形成。这些积极成果将开启通过各种可能的反应生产具有生物活性的吡唑并[3,4- b ]吡啶和吡唑啉衍生物的可能性。
Asymmetric aza‐Friedel–Crafts Reaction of Cyclic Ketimines with 5‐Aminopyrazole Derivatives: Expedient Access to Pyrazole‐Based C2‐quaternary Indolin‐3‐Ones
Herein, we describe a challenging chiralphosphoricacid-catalyzedasymmetricaza-Friedel–Craftsreaction of 5-aminopyrazoles with cyclic-ketimines attached to neutral functional group, achieving enantiomerically enriched pyrazole-based C2-quaternary indolin-3-ones with highly enantioselectivities and regioselectivities.