[DE] 8-[3-AMINO-PIPERIDIN-1-YL]-XANTHINE, DEREN HERSTELLUNG UND DEREN VERWENDUNG ALS ARZNEIMITTEL [EN] 8-[3-AMINO-PIPERIDIN-1-YL]-XANTHINES, THE PRODUCTION THEREOF, AND THE USE OF THE SAME AS MEDICAMENTS [FR] 8-[3-AMINO-PIPERIDIN-1-YL]-XANTHINES, LEUR PRODUCTION ET LEUR UTILISATION COMME MEDICAMENT
Alkenyldiarylmethanes, Fused Analogs And Syntheses Thereof
申请人:Cushman Mark S.
公开号:US20080300288A1
公开(公告)日:2008-12-04
Non-nucleoside inhibitors of HIV-1 reverse transcriptase are described. Such inhibitors may be used as part of a combination therapy to treat HIV infection. Compounds described herein exhibit antiviral potency. In addition, compounds described herein exhibit metabolic stability. Also described herein are processes for preparing Non-nucleoside inhibitors of HIV-1 reverse transcriptase.
Photo-Fries rearrangements of N-acyl-2,3-dihydrobenzoxazol-2-ones are described. Irradiation of N-acyl-2-3-dihydrobenzoxazol-2-ones in acetonitrile afforded a mixture of 2-acyl-2,3-dihydrobenzoxazol-2-one and 6-acyl-2,3-dihydrobenzoxazol-2-one together with other minor products. However, 2,3-dihydrobenzoxazol-2-one and N-methyl-2,3-dihydrobenzoxazol-2-one were very photostable. The reaction scheme involving Norrish type I dissociation has been discussed.
8-[3-Amino-piperidin-1-yl]-xanthines, their preparation and their use as pharmaceutical composition
申请人:Himmelsbach Frank
公开号:US20050187227A1
公开(公告)日:2005-08-25
The present invention relates to substituted xanthines of general formula
wherein R
1
and R
2
are defined as in the claims, the tautomers, the stereoisomers, the mixtures thereof, and the salts thereof, which have valuable pharmacological properties, particularly an inhibiting effect on the activity of the enzyme dipeptidylpeptidase-IV (DPP-IV).
Biomimetic synthesis of 4-acetylbenzoxazolin-2(3<i>H</i>)-one isolated from<i>Zea mays</i>
作者:Carlos A. Escobar、Michael Kluge、Dieter Sicker
DOI:10.1002/jhet.5570340506
日期:1997.9
4-Acetylbenzoxazolin-2(3H)-one has been prepared biomimetically during attempts to synthesize the hemiacetalic hydroxamic acid 5-acetyl-2,4-dihydroxy-2H-1,4-benzoxazin-3(4H)-one by the immediate degradation of this unstable compound generated as an intermediate. Thus, 4-acetylbenzoxazolin-2(3H)-one recently isolated from Zea mays kernels, and similar to other benzoxazolin-2(3H)-ones known from plant
4- Acetylbenzoxazolin-2(3 ħ) -酮已经被尝试以合成的半缩醛羟肟酸5-乙酰基-2,4-二羟基-2-期间仿生制备ħ -1,4-苯并恶嗪-3(4 H ^) -酮通过这种不稳定的化合物会立即降解为中间体。因此,假定最近从玉米粒中分离出的4-乙酰基苯并恶唑啉-2(3H)-与从植物来源中已知的其他苯并恶唑啉-2(3H)-相似,是源自天然5-乙酰基的降解。 -2,4-二羟基-2H-1,4-苯并恶嗪-3(4 H)-1可以通过β-葡萄糖苷酶从相应的2-β-D-葡萄糖苷酶促释放。
Synthesis of 4-Acetylbenzoxazolin-2(3<i>H</i>)-one Reported from <i>Zea </i><i>m</i><i>ays</i>
作者:Michael Kluge、Dieter Sicker
DOI:10.1021/np970525d
日期:1998.6.1
A three-step alternative synthesis of 4-acetylbenzoxazolin-2(3H)-one (4) is reported. Starting from inexpensive 3-hydroxyacetophenone (1) 3-hydroxy-2-nitroacetophenone (2) is prepared by nitration followed by catalytic hydrogenation to yield 2-amino-3-hydroxyacetophenone (3) in which a C=O unit is inserted by means of bis(trichloromethyl)carbonate (triphosgene) in the presence of triethylamine to afford