摘要:
A novel compound having an excellent NFκB inhibitory effect is provided. Specifically disclosed is a compound represented by the following formula (1) or a salt thereof: wherein, R1 represents a hydrogen atom, a lower alkyl group, or the like; R2 represents a hydrogen atom, a lower alkyl group, a halogen atom, or the like; R3 represents a hydrogen atom, a lower alkyl group, a hydroxyl group, or a halogen atom; R4 represents a hydrogen atom or a lower alkyloxy group; R5 represents a hydrogen atom, a lower alkyloxy group, a halogen atom, a hydroxyl group, or a methylenedioxy group formed together with R6 or an isopropylidenedioxy group formed together with R6; R6 represents a hydrogen atom, a lower alkyloxy group, or a methylenedioxy group formed together with R5 or an isopropylidenedioxy group formed together with R5; R7 represents a hydrogen atom or a lower alkyl group; and R8 represents a hydrogen atom, a hydroxyl group, an amino group, a lower alkylcarbonyloxy group, or a halogen atom.
摘要:
A novel compound having an excellent NFκB inhibitory effect is provided and specifically disclosed is a compound represented by the following formula (1) or a salt thereof:wherein, R1 represents a hydrogen atom, a lower alkyl group, a lower alkyloxy group, or a halogen atom; R2 represents a hydroxyl group, or a lower alkyloxy group; R3 represents a hydrogen atom, a lower alkyl group, or a halogen atom; R4 represents a hydrogen atom or a lower alkyloxy group; R5 represents a hydrogen atom, a lower alkyloxy group, a halogen atom, a hydroxyl group, or a methylenedioxy group formed together with R6 or an isopropylidenedioxy group formed together with R6; R6 represents a hydrogen atom, a lower alkyloxy group, or a methylenedioxy group formed together with R5 or an isopropylidenedioxy group formed together with R5; R7 represents a hydrogen atom or a lower alkyl group; and R8 represents a hydrogen atom, a hydroxyl group, an amino group, or a lower alkylcarbonyloxy group (excluding the case where R1, R3, R4 and R7 are hydrogen atoms, R2 and R8 are hydroxyl groups, and R5 and R6 are methoxy groups).
摘要:
A novel compound having an excellent NFκB inhibitory effect is provided. Specifically disclosed is a compound represented by the following formula (1) or a salt thereof: wherein, R1 represents a hydrogen atom, a lower alkyl group, or the like; R2 represents a hydrogen atom, a lower alkyl group, a halogen atom, or the like; R3 represents a hydrogen atom, a lower alkyl group, a hydroxyl group, or a halogen atom; R4 represents a hydrogen atom or a lower alkyloxy group; R5 represents a hydrogen atom, a lower alkyloxy group, a halogen atom, a hydroxyl group, or a methylenedioxy group formed together with R6 or an isopropylidenedioxy group formed together with R6; R6 represents a hydrogen atom, a lower alkyloxy group, or a methylenedioxy group formed together with R5 or an isopropylidenedioxy group formed together with R5; R7 represents a hydrogen atom or a lower alkyl group; and R8 represents a hydrogen atom, a hydroxyl group, an amino group, a lower alkylcarbonyloxy group, or a halogen atom.
摘要:
A novel compound having an excellent NFκB inhibitory effect is provided and specifically disclosed is a compound represented by the following formula (1) or a salt thereof:wherein, R1 represents a hydrogen atom, a lower alkyl group, a lower alkyloxy group, or a halogen atom;R2 represents a hydroxyl group, or a lower alkyloxy group;R3 represents a hydrogen atom, a lower alkyl group, or a halogen atom;R4 represents a hydrogen atom or a lower alkyloxy group;R5 represents a hydrogen atom, a lower alkyloxy group, a halogen atom, a hydroxyl group, or a methylenedioxy group formed together with R6 or an isopropylidenedioxy group formed together with R6;R6 represents a hydrogen atom, a lower alkyloxy group, or a methylenedioxy group formed together with R5 or an isopropylidenedioxy group formed together with R5;R7 represents a hydrogen atom or a lower alkyl group; andR8 represents a hydrogen atom, a hydroxyl group, an amino group, or a lower alkylcarbonyloxy group (excluding the case where R1, R3, R4 and R7 are hydrogen atoms, R2 and R8 are hydroxyl groups, and R5 and R6 are methoxy groups).
摘要:
A method for preparing a novel crystalline polymorphic irinotecan hydrochloride which is excellent in the solubility in water and reduced in the content of impurities is provided. A method for preparing c-type crystals of irinotecan hydrochloride having diffraction peaks (2θ) at 9.15°, 10.00°, 11.80°, 12.20°, 13.00° and 13.40° in the powder X-ray diffractometry characterized by mixing irinotecan with one or more solvents selected from the group consisting of acetone, acetonitrile and tetrahydrofuran, adding hydrochloric acid, and collecting the formed crystals.
摘要:
Problem: A large scale production of camptothecin, which is a starting compound of irinotecan hydrochloride and various camptothecin derivatives, at a low cost and with ease. Solution: A process for preparing camptothecin, characterized in that it comprises the following steps (a) and (b); (a) the step to hydrolyze 9-methoxycamptothecin or a natural material containing 9-methoxycamptothecin; (b) the step to convert 9-hydroxycamptothecin obtained in the step (a) into camptothecin by 9-O—perfluoro-lower-alkylsulfonylation or 9-O—phenyltetrazolylation, followed by hydrogenolysis.
摘要:
Disclosed is a process for production of 7-ethyl-10-[4-(1-piperidino)-1-piperidino]-carbonyloxycamptothecin from a camptothecin composition containing 18,19-dehydrocamptothecin without producing any vinyl form of the compound. The process is characterized by catalytically reducing at least one compound selected from a compound (1) and others in the process of producing a compound (5) from a composition containing the compound (1).
摘要:
New camptothecin derivatives of the general formula (1): ##STR1## wherein R.sup.1 represents a hydrogen atom or a C.sub.1 -C.sub.6 alkyl group, R.sup.2 represents a hydrogen or a C.sub.1 -C.sub.6 alkoxy group, R.sup.3 represents a hydrogen or halogen atom or a C.sub.1 -C.sub.6 alkyl, C.sub.1 -C.sub.6 alkoxy, hydroxyl, C.sub.2 -C.sub.6 acyloxy or methoxyethoxymethoxy group, R.sup.4 represents a hydrogen or halogen atom, and R.sup.5 represents a C.sub.1 -C.sub.6 alkyl, C.sub.3 -C.sub.6 unsaturated alkyl, alkylthioalkyl, alkoxyalkyl, pyridyl or substituted phenyl group, with the proviso that all of the R.sup.2, R.sup.3 and R.sup.4 substituents should not be a hydrogen atom, and a process for preparing the new camptothecin derivatives by subjecting the camptothecin derivatives of the general formula (2): ##STR2## wherein R.sup.1, R.sup.2, R.sup.3 and R.sup.4 have the same meanings as given above, to the reaction with N,N-dimethylethylenediamine without solvent to open the E-lactone ring followed by acylation of 17-hydroxyl group with corresponding acylating agents and an antitumor agent containing the same as an active ingredient.
摘要:
New camptothecin derivatives, useful as antitumor agents or intermediates therefor, of the general formula (I) ##STR1## wherein X is a lower alkyl group, and R is a hydrogen atom or the grouping -COY where Y is a linear or branched unsubstituted C.sub.1 -C.sub.18 alkyl group; a lower alkyl group substituted by a halogen atom or a lower alkylthio, amino, acylamino, hydroxyl, lower alkoxy, aryloxy or lower alkoxycarbonyl group; a C.sub.3 -C.sub.19 alkenyl, C.sub.3 -C.sub.19 alkynyl or C.sub.3 -C.sub.8 cycloalkyl group; a C.sub.3 -C.sub.8 cycloalkyl group substituted by an acylamino-lower alkyl group; an N-acylpyrrolidyl group; a phenyl group; a phenyl group substituted by a halogen atom or a trifluoromethyl, nitro, amino, lower alkoxycarbonyl, lower alkyl, phenyl or lower alkoxy; a cinnamyl group; a benzyl group; a naphthyl group; a pyridyl group; a furyl group; or a thienyl group, as well as acid addition salts and quaternary ammonium salts thereof,and a process for preparing the new camptothecin derivatives by subjecting 7-ethylcamptothecin to the treatment with an N-di-X-ethylenediamine followed by acylation.
摘要:
Disclosed is a process for production of 7-ethyl-10-[4-(1-piperidino)-1-piperidino]-carbonyloxycamptothecin from a camptothecin composition containing 18,19-dehydrocamptothecin without producing any vinyl form of the compound. The process is characterized by catalytically reducing at least one compound selected from a compound (1) and others in the process of producing a compound (5) from a composition containing the compound (1).