Abstract: 5-alkylthio-7-[(4-arylbenzyl)amino]-1(2)H-pyrazolo[4,3-d]pyrimidine derivatives of formula I that are effective inhibitors of kinases and exhibit strong antiproliferative and proapoptotic properties on lymphoma cells. Derivatives in the treatment of blood hyperproliferative diseases, such as Non-Hodgkin lymphomas are also disclosed.

Abstract: An improved process for preparing 2-chloro-4-nitroimidazole derivatives which are useful intermediates in the preparation of an anti-tuberculosis drug is provided. The process may comprise the step of chlorinating nitroimidazoles with a chlorinating agent and an activating agent to give 2-chloro-4-nitroimidazole derivatives.

Abstract: The present invention relates to a method of production of 4-boronophenylalanine (BPA) from 4-iodophenylalanine, in which all the functional groups of the amino acid are protected by benzyl protection method, and which uses isopropyl magnesium halogenide stabilized by a complexation base, and subsequent condensation of the resulting Grignard reagent with a boric acid ester. The final reaction step, catalytic hydrogenolysis or transfer hydrogenolysis of protecting groups on the amino acid, occurs after hydrolysis of the boronate ester groups.

Abstract: An improved process for preparing 2-chloro-4-nitroimidazole derivatives which are useful intermediates in the preparation of an anti-tuberculosis drug is provided. The process may comprise the step of chlorinating nitroimidazoles with a chlorinating agent and an activating agent to give 2-chloro-4-nitroimidazole derivatives.

Abstract: The present invention relates to a method of production of 4-boronophenylalanine (BPA) from 4-iodophenylalanine, in which all the functional groups of the amino acid are protected by benzyl protection method, and which uses isopropyl magnesium halogenide stabilized by a complexation base, and subsequent condensation of the resulting Grignard reagent with a boric acid ester. The final reaction step, catalytic hydrogenolysis or transfer hydrogenolysis of protecting groups on the amino acid, occurs after hydrolysis of the boronate ester groups.

Abstract: 5-alkylthio-7-[(4-arylbenzyl)amino]-1(2)H-pyrazolo[4,3-d]pyrimidine derivatives of formula I that are effective inhibitors of kinases and exhibit strong antiproliferative and proapoptotic properties on lymphoma cells. Derivatives in the treatment of blood hyperproliferative diseases, such as Non-Hodgkin lymphomas are also disclosed.

Abstract: 5-substituted-7-[4-(2-pyridyl)phenylmethylamino]-3-isopropylpyrazolo[4,3-d]pyrimidines are potent inhibitors of protein kinases, especially cyclin-dependent kinases such as CDK2 and CDK5, and display antileukemic, pro-apoptotic, antiangiogenic and anticancer activities. The invention also relates to processes for their preparation, to pharmaceutical compositions and to their use as medicaments, particularly in the treatment of disorders involving cell proliferation, apoptosis, angiogenesis and inflammation, such as leukemia and metastatic solid cancer.

Abstract: 5-substituted-7-[4-(2-pyridyl)phenylmethylamino]-3-isopropylpyrazolo[4,3-d]pyrimidines are potent inhibitors of protein kinases, especially cyclin-dependent kinases such as CDK2 and CDK5, and display antileukemic, pro-apoptotic, antiangiogenic and anticancer activities. The invention also relates to processes for their preparation, to pharmaceutical compositions and to their use as medicaments, particularly in the treatment of disorders involving cell proliferation, apoptosis, angiogenesis and inflammation, such as leukemia and metastatic solid cancer.

Abstract: A cell-protective composition for preventing or treating of a peptic ulcer due to topical endogenous lesion of gastric or duodenal mucous membrane comprises as a physiologically active component the cyclo-(1-alanyl-amino-1-cyclopentanecarbonyl)cyclodipeptide. The subject composition is designated for administration by oral or parenteral route. It is substantially non-toxic and well tolerated, and acts beneficially, even at low dosage level.

Abstract: Peptide ester and amide derivatives of the general formula I: ##STR1## in which X is H or an acyl, A and B are structurally defined amino acid residues, n is an integer of from 1 to 3, R.sup.1 is H or a lower alkyl and either R.sup.2 or C is a defined optionally modified amino acid residue and the other is a lower alkoxyl, an amino group or a direct chemical bond, are converted under physiologic conditions, by enzymic hydrolysis in pathologically altered tissues and subsequent spontaneous cyclization, into pharmacodynamically active spirocyclic peptide derivatives of the general formula III: ##STR2## in which R.sup.3 and R.sup.4 are H atoms, optionally substituted alkyl groups or jointly an aliphatic chain forming preferably a 2,5- piperazinedione ring, and hence can act as pro-farmaca (drug precursors) of prolonged biological effect.