作者:Alemayehu Gashaw Woldegiorgis、Zhao Han、Xufeng Lin
DOI:10.1002/adsc.202101011
日期:2022.1.18
An enantioselective synthesis of unnatural pyrazole-based α-chiral amino acidderivatives from the asymmetric reaction of N-aryl-5-aminopyrazoles with β,γ-alkynyl-α-imino esters using a chiral spirocyclic phosphoric acid catalyst was developed. Using the established methodology, various pyrazole-based α-aminoacidderivatives with tetrasubstituted carbon stereocenters were obtained in 67–98% yields
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
RAF KINASE MODULATOR COMPOUNDS AND METHODS OF USE THEREOF
申请人:Abraham Sunny
公开号:US20110118245A1
公开(公告)日:2011-05-19
Compounds according to formula (I), compositions and methods are provided for modulating the activity of RAF kinases, including BRAF kinase and for the treatment, prevention, or amelioration of one or more symptoms of disease or disorder mediated by RAF kinases. Formula (I): or a pharmaceutically acceptable salt, solvate, clathrate of hydrate thereof, wherein X is O or S(O)
t
; R
a
is O or S.
RAF kinase modulator compounds and methods of use thereof
申请人:Ambit Biosciences Corporation
公开号:US08969587B2
公开(公告)日:2015-03-03
Compounds, compositions and methods are provided for modulating the activity of RAF kinases, including BRAF kinase and for the treatment, prevention, or amelioration of one or more symptoms of disease or disorder mediated by RAF kinases.
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)。