- Spectroscopic Studies of the Chan-Lam Amination: A Mechanism-Inspired Solution to Boronic Ester Reactivity
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We report an investigation of the Chan-Lam amination reaction. A combination of spectroscopy, computational modeling, and crystallography has identified the structures of key intermediates and allowed a complete mechanistic description to be presented, including off-cycle inhibitory processes, the source of amine and organoboron reactivity issues, and the origin of competing oxidation/protodeboronation side reactions. Identification of key mechanistic events has allowed the development of a simple solution to these issues: manipulating Cu(I) → Cu(II) oxidation and exploiting three synergistic roles of boric acid has allowed the development of a general catalytic Chan-Lam amination, overcoming long-standing and unsolved amine and organoboron limitations of this valuable transformation.
- Vantourout, Julien C.,Miras, Haralampos N.,Isidro-Llobet, Albert,Sproules, Stephen,Watson, Allan J. B.
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supporting information
p. 4769 - 4779
(2017/04/11)
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- Chan-Evans-Lam Amination of Boronic Acid Pinacol (BPin) Esters: Overcoming the Aryl Amine Problem
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The Chan-Evans-Lam reaction is a valuable C-N bond forming process. However, aryl boronic acid pinacol (BPin) ester reagents can be difficult coupling partners that often deliver low yields, in particular in reactions with aryl amines. Herein, we report effective reaction conditions for the Chan-Evans-Lam amination of aryl BPin with alkyl and aryl amines. A mixed MeCN/EtOH solvent system was found to enable effective C-N bond formation using aryl amines while EtOH is not required for the coupling of alkyl amines.
- Vantourout, Julien C.,Law, Robert P.,Isidro-Llobet, Albert,Atkinson, Stephen J.,Watson, Allan J. B.
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p. 3942 - 3950
(2016/05/24)
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- A fragment merging approach towards the development of small molecule inhibitors of Mycobacterium tuberculosis EthR for use as ethionamide boosters
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With the ever-increasing instances of resistance to frontline TB drugs there is the need to develop novel strategies to fight the worldwide TB epidemic. Boosting the effect of the existing second-line antibiotic ethionamide by inhibiting the mycobacterial
- Nikiforov, Petar O.,Surade, Sachin,Blaszczyk, Michal,Delorme, Vincent,Brodin, Priscille,Baulard, Alain R.,Blundell, Tom L.,Abell, Chris
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supporting information
p. 2318 - 2326
(2016/03/01)
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- Transition-metal-free electrophilic amination between aryl grignard reagents and N-chloroamines
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In the presence of N,N,N′,N′-tetramethylethylenediamine (TMEDA) as an additive, easily prepared and handled N-chloroamines react with aryl Grignard reagents to give a variety of arylamines in good to excellent yields. Functional groups such as ester and nitrile are compatible under the reaction conditions (Figure Presented).
- Hatakeyama, Takuji,Yoshimoto, Yuya,Ghorai, Sujit K.,Nakamura, Masaharu
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supporting information; experimental part
p. 1516 - 1519
(2010/06/20)
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- PYRIMIDINE DERIVATIVES USEFUL AS INHIBITORS OF PKC-THETA
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Disclosed are novel compounds of formula (I) wherein R1, R2, R3 , R4 and A are as defined herein, which are useful as inhibitors of PKC-theta and are thus useful for treating a variety of diseases and disorders
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Page/Page column 24
(2008/06/13)
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- Pyrimidine derivatives useful as inhibitors of PKC-theta
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Disclosed are novel compounds of formula (I): wherein X, Y, R1, R2 and R3 are as defined herein, which are useful as inhibitors of PKC-theta and are thus useful for treating a variety of diseases and disorders that are mediated or sustained through the activity of PKC-theta, including immunological disorders and type II diabetes. This invention also relates to pharmaceutical compositions comprising these compounds, methods of using these compounds in the treatment of various diseases and disorders, processes for preparing these compounds and intermediates useful in these processes.
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Page/Page column 131
(2008/06/13)
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- Substituted compounds derived from N-(benzyl)phenylacetamide, preparation and uses
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This invention relates to poly-substituted derivatives of the N-(benzyl)phenylacetamide type, pharmaceutical compositions comprising same, therapeutic uses thereof, more particularly in the fields of human and animal health. This invention also relates to a process for the preparation of such derivatives.
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Page/Page column 34
(2010/10/20)
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- BEZAMIDE DERIVATIVES FOR THE TREATMENT OF DISEASES MEDIATED BY CYTOKINES
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The invention concerns the use of amide derivatives of formula (I) wherein: R1 and R2 are substituents such as hydroxy, C1-6alkoxy, mercapto, C1-6alkylthio, amino, C1-6alkylamino and di-(C1-6alkyl)amino; m and p are independently 0-3; R3 is C1-4alkyl; q is 0-4; and R4 is aryl or cycloalkyl; or a pharmaceutically acceptable salt thereof in the manufacture of a medicament for use in the treatment of diseases or medical conditions mediated by cytokines
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- Method of inhibiting neoplastic cells with imidazoquinazoline derivatives
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A method for inhibiting neoplasia, particularly cancerous and precancerous lesions by exposing the affected cells to imidazoquinazoline derivatives.
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- Improved yields of meta-amination and symmetrical and unsymmetrical diamination of benzenes
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Much higher yields were found after shorter reaction times for the meta-substituted amination of benzenes in DMPU with microwave heating in a sealed tube (180°C, 5 h), e.g. piperidine and m-fluorobenzonitrile 1 gave the m-substituted 3 in 92% yield. These
- Brown, George R.,Foubister, Alan J.,Roberts, Craig A.,Wells, Stuart L.,Wood, Robin
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p. 3917 - 3919
(2007/10/03)
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- Imidazoquinazoline derivatives
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PCT No. PCT/JP97/03023 Sec. 371 Date Apr. 27, 1998 Sec. 102(e) Date Apr. 27, 1998 PCT Filed Aug. 29, 1997 PCT Pub. No. WO98/08848 PCT Pub. Date Mar. 5, 1998Imidazoquinoline derivatives of the formula (wherein X may be O or S) provide selective cyclic guanosine 3',5' monophosphate (cGMP)-specific phosphodiesterase (PDE) inhibitory activity. The compounds are useful for treating or ameliorating cardiovascular disease such as thrombosis, angina pectoris, hypertension, heart failure and arterial sclerosis, as well as asthma, impotence and the like.
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- Synthesis of meta-substituted aniline derivatives by nucleophilic substitution
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Substitution by amines of fluorobenzenes containing a meta- substituted electron withdrawing group (EWG), in DMSO at 100 °C over 60 h gave meta-substituted aniline derivatives in isolated yields of up to 98%. The scope of the reaction is explored in terms of reaction conditions and substrates. It is postulated that facile meta-substitutions are facilitated through field stabilisation of the intermediate anion by EWG substituents.
- Belfield, Andrew J.,Brown, George R.,Foubister, Alan J.,Ratcliffe, Paul D.
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p. 13285 - 13300
(2007/10/03)
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- High yields of meta-substituted amination products in the S(N)Ar substitution of benzenes
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Morpholine substitution in fluorobenzenes containing a meta-substituted electron withdrawing group proceeds in DMSO at 100 °C over 60 h to give meta-substitution products (by fluoride ion displacement) in pure isolated yields of 19-98%.
- Brown,Foubister,Ratcliffe
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p. 1219 - 1222
(2007/10/03)
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- The antiinfluenza activity of pyrrolo[2,3-d]pyrimidines
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From a group of pyrrolo[2,3-d]pyrimidine compounds that have been screened against influenza virus, one derivative, 4-(3-piperidinyl benzylamino)-2-methyl-7H-pyrrolo[2,3-d]pyrimidine (9), has shown promising activity against both the A and B strains. The
- Sznaidman, Marcos L.,Meade, Eric A.,Beauchamp, Lilia M.,Russell, Stuart,Tisdale, Margaret
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p. 565 - 568
(2007/10/03)
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