- Practical CuCl/DABCO/4-HO-TEMPO-catalyzed oxidative synthesis of nitriles from alcohols with air as oxidant
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A mild and efficient methodology for the direct oxidative synthesis of nitriles from easily available alcohols and aqueous ammonia by employing CuCl/DABCO/4-HO-TEMPO as the catalysts is described. This protocol uses the air as a green oxidant and aqueous ammonia as the nitrogen source at room temperature. A variety of aryl, heterocyclic and allylic alcohols are smoothly converted into the corresponding nitriles in good to excellent yields.
- Hu, Yongke,Chen, Lei,Li, Bindong
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supporting information
p. 464 - 466
(2017/11/13)
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- New trelagliptin preparation process
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The present invention provides a trelagliptin preparation process, which comprises that: 1) a compound 4 and a compound 5 are adopted as raw materials, and are subjected to a condensation reaction in an organic solvent in the presence of an alkali to obtain a compound 6; 2) the compound 6 reacts with an acid HA in an organic solvent to remove the t-butyloxy carbonyl so as to obtain a trelagliptin.HA salt; and 3) the trelagliptin.HA salt is subjected to alkali neutralization treatment and purification to obtain the trelagliptin, wherein the reaction route is defined in the specification. According to the present invention, in the improved preparation process, the 2-site amino of the compound 5 is protected by the t-butyloxy carbonyl, such that the selectivity of the nucleophilic substitution reaction is improved, and the impurity production caused by primary amine substitution is avoided so as to improve the nucleophilic substitution yield and improve the trelagliptin purity.
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Paragraph 0033; 0034; 0035
(2016/10/17)
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- Synthetic method of trelagliptin, trelagliptin synthesized through method and trelagliptin synthesis intermediate
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The invention discloses a synthetic method of trelagliptin, trelagliptin synthesized through the method and a trelagliptin synthesis intermediate. The synthetic method of trelagliptin comprises the following steps: 1, taking 2-hydroxymethyl-4-fluorobenzonitrile as a starting raw material, and conducting a chlorination reaction, so that 2-chloromethyl-4-fluorobenzonitrile is obtained; 2, taking the 2-chloromethyl-4-fluorobenzonitrile as an intermediate, and conducting a condensation reaction, so that 2-[(6-chlorine-3,4-dihydro-3-methyl-2,4-dioxo-1(2H)-pyrimidyl)methyl]-4-fluorobenzonitrile is obtained; 3, taking the 2-[(6-chlorine-3,4-dihydro-3-methyl-2,4-dioxo-1(2H)-pyrimidyl)methyl]-4-fluorobenzonitrile as an intermediate, and conducting an ammonolysis reaction, so that trelagliptin alkali is obtained. By means of the method, use of high-toxicity copper cyanide is avoided, safety of the synthesis process is improved, environment friendliness is achieved, the formed chloro intermediate is more stable, and no irritation is caused.
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Paragraph 0070-0075
(2017/01/26)
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- A PROCESS FOR THE PREPARATION OF 4-FLUORO-2-METHYLBENZONITRILE
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The present invention provides a process for the preparation of 4-fluoro-2- methylbenzonitrile of Formula (II), and its use for the preparation of trelagliptin or its salts. The present invention provides an efficient, simple, and commercially friendly pr
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Page/Page column 9
(2016/02/29)
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- Cobalt-Catalyzed Electrophilic Cyanation of Arylzinc Halides with N-Cyano-N-phenyl-p-methylbenzenesulfonamide (NCTS)
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The cobalt-catalyzed cross-coupling of organozinc bromides with N-cyano-N-phenyl-p-methylbenzenesulfonamide (NCTS) is described. The same cobalt catalyst, cobalt(II) bromide, was used for both the synthesis of the organozinc species and the cross-coupling reaction. However in this case, a catalytic amount of zinc dust is necessary in the second step to release the low-valent cobalt. Under these mild conditions, moderate to excellent yields of different benzonitriles were obtained.
- Cai, Yingxiao,Qian, Xin,Rrat, Alice,Auffrant, Audrey,Gosmini, Corinne
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supporting information
p. 3419 - 3423
(2016/01/25)
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- Highly practical synthesis of nitriles and heterocycles from alcohols under mild conditions by aerobic double dehydrogenative catalysis
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A mild, aerobic, catalytic process for obtaining nitriles directly from alcohols and aqueous ammonia is described. The reaction proceeds via a dehydrogenation cascade mediated by catalytic CuI, bpy, and TEMPO in the presence of O2. The substrate scope is broad including various functionalized aromatic and aliphatic alcohols. This protocol enabled the one-pot synthesis of various biaryl heterocycles directly from commercially available alcohols.
- Yin, Weiyu,Wang, Chengming,Huang, Yong
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supporting information
p. 1850 - 1853
(2013/06/04)
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- Design and synthesis of pyrimidinone and pyrimidinedione inhibitors of dipeptidyl peptidase IV
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The discovery of two classes of heterocyclic dipeptidyl peptidase IV (DPP-4) inhibitors, pyrimidinones and pyrimidinediones, is described. After a single oral dose, these potent, selective, and noncovalent inhibitors provide sustained reduction of plasma DPP-4 activity and lowering of blood glucose in animal models of diabetes. Compounds 13a, 27b, and 27j were selected for development.
- Zhang, Zhiyuan,Wallace, Michael B.,Feng, Jun,Stafford, Jeffrey A.,Skene, Robert J.,Shi, Lihong,Lee, Bumsup,Aertgeerts, Kathleen,Jennings, Andy,Xu, Rongda,Kassel, Daniel B.,Kaldor, Stephen W.,Navre, Marc,Webb, David R.,Gwaltney, Stephen L.
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experimental part
p. 510 - 524
(2011/03/20)
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- DIPEPTIDYL PEPTIDASE INHIBITORS
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Methods of making compounds of the formula (I) wherein the variables are as defined herein. Also, methods of making compounds that may be used to inhibit dipeptidyl peptidase.
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Page/Page column 30
(2009/12/02)
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- ADMINISTRATION OF DIPEPTIDYL PEPTIDASE INHIBITORS
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Pharmaceutical compositions comprising 2-[6-(3-Amino-piperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl]-4-fluoro-benzonitrile and pharmaceutically acceptable salts thereof are provided as well as kits and articles of manufacture comprising the pharmaceutical compositions as well as methods of using the pharmaceutical compositions.
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Page/Page column 38
(2008/06/13)
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- POLYMORPHS OF SUCCINATE SALT OF 2-[6-(3-AMINO-PIPERIDIN-1-YL)-3-METHYL-2,4-DIOXO-3,4-DIHYDRO-2H-PYRIMIDIN-1-YLMETHY]-4-FLUOR-BENZONITRILE AND METHODS OF USE THEREFOR
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Compositions comprising the succinate salt of 2-[6-(3-Amino-piperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl]-4-fluoro-benzonitrile (referred to herein as Compound I) which has the formula: (I) wherein the Compound I is present in one or more polymorphic forms. Also provided are novel methods for the preparation of the polymorphs of Compound I, and kits and articles of manufacture of the compositions, and methods of using the compositions to treat various diseases.
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Page/Page column 48
(2008/12/06)
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- ADMINISTRATION OF DIPEPTIDYL PEPTIDASE INHIBITORS
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Pharmaceutical compositions comprising 2-[6-(3-Amino-piperidin-1-yl)-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidin-1-ylmethyl]-4-fluoro-benzonitrile and pharmaceutically acceptable salts thereof are provided as well as kits and articles of manufacture comprising the pharmaceutical compositions as well as methods of using the pharmaceutical compositions.
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Page/Page column 14; 15
(2010/11/26)
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- ISOINDOLONE COMPOUNDS AND THEIR USE AS METABOTROPIC GLUTAMATE RECEPTOR POTENTIATORS
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The present invention is directed to compounds of formula (I), wherein R1 is a ring and n is a number from 1 to 8. The invention also relates to use of the compounds in therapy as metabotropic glutamate receptor modulators, particularly in neurological and psychiatric disorders.
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Page/Page column 55
(2008/06/13)
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- N-PHENYL-(2R,5S)DIMETHYLPIPERADINE DERIVATIVE
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The present invention relates to a novel N-phenyl-(2R,5S)dimethylpiperazine derivatives useful as antiandrogenic agent which exhibits a sufficient prostate gland reducing effect as compared with conventional compounds and are excellent in oral activity. The compound of the present application is useful in preventing or treating prostate cancer, benign prostatic hyperplasia, and the like. The present invention also provides a novel intermediate useful in producing the compound of the present invention.
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Page/Page column 15-16
(2010/02/12)
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- Dipeptidyl peptidase inhibitors
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Compounds, pharmaceuticals, kits and methods are provided for use with DPP-IV inhibitors comprising Formula I: wherein the substituents are as described herein.
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Page/Page column 59
(2008/06/13)
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- Dipeptidyl peptidase inhibitors
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Compounds, pharmaceuticals, kits and methods are provided for use with DPP-IV and other S9 proteases that comprise a compound comprising Formula I: wherein M is N or CR4; Q1 and Q2 are each independently selected from the group consisting of CO, SO, SO2, and C=NR9; and each R1, R2, R3, R4 and R9 are as defined herein.
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Page/Page column 54
(2008/06/13)
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- Aminoisoquinolines and aminotheinopyridine derivatives and their use as anti-inflammatory agents
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PCT No. PCT/SE97/00589 Sec. 371 Date Aug. 19, 1997 Sec. 102(e) Date Aug. 19, 1997 PCT Filed Apr. 9, 1997 PCT Pub. No. WO97/38977 PCT Pub. Date Oct. 23, 1997Compounds of formula I wherein R, R1, R2, and R3 and A are as defined herein, together with pharmaceutically acceptable salts, enantiomers or tautomers are useful as pharmaceuticals, particularly in the treatment of inflammatory disease.
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