Substituted quinazoline derivatives and their use as inhibitors
申请人:AstraZeneca AB
公开号:US20030187002A1
公开(公告)日:2003-10-02
The use of a compound of formula (I)
1
or a salt, ester or amide thereof;
where X is O, or S, S(O) or S(O)
2
, or NR
6
where R
6
is hydrogen or C
1-6
alkyl,;
R
5
is an optionally substituted 5-membered heteroaromatic ring,
R
1
, R
2
, R
3
, R
4
are independently selected from various specified moieties, in the preparation of a medicament for use in the inhibition of aurora 2 kinase.
Certain compounds are novel and these, together with pharmaceutical compositions containing them are also described and claimed.
[EN] OXADIAZEPINONE DERIVATIVES AND THEIR USE IN THE TREATMENT OF HEPATITIS B INFECTIONS<br/>[FR] DÉRIVÉS D'OXADIAZÉPINONE ET LEUR UTILISATION DANS LE TRAITEMENT D'INFECTIONS PAR L'HÉPATITE B
申请人:NOVIRA THERAPEUTICS INC
公开号:WO2018005881A1
公开(公告)日:2018-01-04
Provided herein are compounds of formula (IA) and (III) useful for the treatment of HBV infection in a subject in need thereof, pharmaceutical compositions thereof, and methods of inhibiting, suppressing, or preventing HBV infection in the subject.
Indium(III) Halides as New and Highly Efficient Catalysts for <i>N</i>-<i>tert</i>-Butoxycarbonylation of Amines
作者:Asit Chakraborti、Sunay Chankeshwara
DOI:10.1055/s-2006-942492
日期:2006.8
Indium(III) bromide and chloride efficiently catalysed the N-tert-butoxycarbonylation of amines with (Boc)2O at room temperature and under solvent-free conditions. Various aromatic, heteroaromatic and aliphatic amines were converted to N-tert-butylcarbamates in excellent yields in short times. Chiral amines, esters of α-amino acids and β-amino alcohols afforded optically pure N-t-Boc derivatives in high yields. The reactions were chemoselective and no competitive side reactions such as isocyanate, urea, and N,N-di-t-Boc formation were observed. Chemoselective conversion to N-tert-butylcarbamates took place with amino alcohols without any formation of oxazolidinones.
Teaching Old Compounds New Tricks: DDQ-Photocatalyzed C−H Amination of Arenes with Carbamates, Urea, and N-Heterocycles
作者:Somnath Das、Palani Natarajan、Burkhard König
DOI:10.1002/chem.201705442
日期:2017.12.22
The C-H amination of benzene derivatives was achieved using DDQ as photocatalyst and BocNH2 as the amine source under aerobic conditions and visible light irradiation. Electron-deficient and electron-rich benzenes react as substrates with moderate to good product yields. The amine scope of the reaction comprises Boc-amine, carbamates, pyrazoles, sulfonimides and urea. Preliminary mechanistic investigations
Nonsolvent Application of Ionic Liquids: Organo-Catalysis by 1-Alkyl-3-methylimidazolium Cation Based Room-Temperature Ionic Liquids for Chemoselective <i>N</i>-<i>tert</i>-Butyloxycarbonylation of Amines and the Influence of the C-2 Hydrogen on Catalytic Efficiency
作者:Anirban Sarkar、Sudipta Raha Roy、Naisargee Parikh、Asit K. Chakraborti
DOI:10.1021/jo201102q
日期:2011.9.2
1-Alkyl-3-methylimidazolium cation based ionicliquids efficiently catalyze N-tert-butyloxycarbonylation of amines with excellent chemoselectivity. The catalytic role of the ionicliquid is envisaged as “electrophilic activation” of di-tert-butyl dicarbonate (Boc2O) through bifurcated hydrogen bond formation with the C-2 hydrogen of the 1-alkyl-3-methylimidazolium cation and has been supported by a
1-烷基-3-甲基咪唑鎓阳离子类离子液体有效地催化ñ -叔胺的-butyloxycarbonylation具有优良的化学选择性。所述离子液体的催化作用是设想为二的“亲电活化”叔丁基酯(BOC 2 O)通过分叉氢键的形成与1-烷基-3-甲基咪唑鎓阳离子的和C-2的氢已由咪唑C-2氢1-丁基-3-甲基咪唑鎓双(三氟甲基磺酰)亚胺([BMIM] [NTF的的低磁场移位支撑2从δ8.39]),以8.66的中的Boc存在2于O 11 H NMR和无C-2氢的1-丁基-2,3-二甲基咪唑鎓离子液体的催化效率急剧降低。与芳族和脂族胺反应所需的不同时间为分子间和分子内竞争期间选择性形成N - t- Boc提供了手段。在伯脂族胺的存在下,已经与仲脂族胺形成了优选的N - t- Boc。比较N - t -Boc与常见底物的催化效率,发现[bmim] [NTf 2 ]优于已报道的路易斯酸催化剂。