- BICYCLIC COMPOUNDS AS INHIBITORS OF PD1/PD-L1 INTERACTION/ACTIVATION
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The compounds of Formula I is described herein along with their polymorphs, stereoisomers, tautomers, prodrugs, solvates, and pharmaceutically acceptable salts thereof. The compounds described herein, their polymorphs, stereoisomers, tautomers, prodrugs, solvates, and pharmaceutically acceptable salts thereof are bicyclic compounds that are inhibitors of PD-1/PD-L1 interaction/activation.
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- 2-SUBSTITUTED-ETHYNYLTHIAZOLE DERIVATIVES AND USES OF SAME
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The present invention provides 2-substituted-ethynylthiazole derivatives of formula (I): wherein R1, R2 and X are as defined herein, or a pharmaceutically acceptable salt thereof; and pharmaceutical compositions and methods of using same.
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Page/Page column 17
(2011/05/03)
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- Determination of the gauche effect of 3-acetamido- and 3-acetoxy-piperidine and -tetrahydropyran by 1H-n.m.r. spectroscopy
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The A-values of the acetamido and the acetoxy group were determined by low-temperature 1H-n.m.r. spectroscopy.The limiting values for the relevant vicinal coupling constants of the newly prepared trans- (22) and cis-5-acetoxy-2-(1-hydroxy-1-methylethyl)tetrahydropyran (24) were obtained at room temperature.The attractive gauche effect of AcNH-3 and AcO-3 in piperidines, piperidinium trifluoroacetates, and tetrahydropyrans was investigated by 1H-n.m.r. spectroscopy both at low temperature (integrals) and at room temperature (band widths and coupling constants).The results obtained at low temperature are more reliable.The position of the conformational equilibrium of N-(3-piperidyl)acetamide (11), N-(1-methyl-3-piperidyl)acetamide (12), and N-(tetrahydropyran-3-yl)acetamide (17) depends strongly upon the nature of the solvent and, in apolar solvents, upon the concentration.
- Bernet, Bruno,Piantini, Umberto,Vasella, Andrea
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- Synthesis of nitrosourea derivatives of pyridine and piperidine as potential anticancer agents.
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Nitrosourea derivatives 18-22 which utilize either a piperidine or pyridine ring as a carrier group were synthesized and evaluated for anticancer activity. N'-(1-Benzyl-4-piperidinyl)-N-(2-chloroethyl)-N-nitosourea hydrogen maleate (19) exhibited good activity against intracranial L1210 leukemia as well as the mouse ependymoblastoma brain tumor system. Compound 19 exhibited comparable activity in the Lewis lung carcinoma system to N,N'-bis(2-chloroethyl)-N-nitrosourea. Replacement of the N-benzyl group in both the 3-piperidinyl- and 4-piperidinylnitrosoureas resulted in less active compounds in all tumor systems tested. The 3-pyridylnitrosourea 22 was inactive in the L-1210 leukemia system.
- Crider,Lamey,Floss,Cassady,Bradner
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p. 848 - 851
(2007/10/02)
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