摘要:
A derivative of thiazolo [3,2-a] pyrimidine expressed by formula (I) ##STR1## (where R indicates a phenyl group or a benzyl group which has a halogen atom, a lower alkyl or lower alkyloxy group as a substituent group, an alicyclic group or an arylethyl group), and a process for the preparation of a compound of formula (I) comprising cyclizing a compound expressed by formula (II) by application of heat ##STR2## (where a definition of R is as same as that given in case of formula (I) and R' indicates a halogen atom or lower alkyloxy group). A drug which contains this compound as active ingredient is useful for curing autoimmune diseases such as rheumatoid arthritis, nephritis, etc.
摘要:
A pyrrolo[2,3-d]pyrimidine derivative having the general formula [I] ##STR1## wherein R.sup.1, R.sup.2, R.sup.3, R.sup.4, R.sup.5, Y and Z have the same definitions as those given in the description, a pharmaceutically acceptable acid addition salt thereof, and a pharmaceutical preparation comprising the same, are provided.
摘要:
A compound represented by the following formula ##STR1## wherein R.sup.1 represents a hydrogen atom, an acyl group or an alkoxycarbonyl group; X.sup.1 represents an alkylene group having 3 to 6 carbon atoms, a 1,4-cyclohexylene group, or a 1,4-phenylene group, the alkylene group may be substituted by an alkyl group having 1 to 6 carbon atoms, and the 1,4-phenylene group may be substituted by 1 or 2 substituents selected from halogen atoms and alkoxy groups having 1 to 6 carbon atoms; R.sup.2 represents a hydrogen atom or a hydroxyl group and R.sup.3 represents hydrogen atom, or R.sup.2 and R.sup.3 together may form an oxo group (.dbd.O), and when X.sup.1 is other than the 1,4-phenylene group, R.sup.2 represents a hydrogen atom and R.sup.3 represents a bond between the carbon atoms to which R.sup.3 is bonded and that carbon atom of X.sup.1 which is adjacent to said carbon atom; X.sup.2 represents an alkylene group having 1 to 5 carbon atoms which may be substituted by an alkyl group having 1 to 6 carbon atoms or an amino group; and R.sup.4 represents the group --COOR.sup.5, --CH.sub.2 OR.sup.6 or --CONR.sup.7 R.sup.8 in which R.sup.5 represents a hydrogen atom or an alkyl group having 1 to 6 carbon atoms, R.sup.6 represents a hydrogen atom or an acyl group having 1 to 6 carbon atoms, and R.sup.7 and R are identical or different and represent a hydrogen atom or an alkyl group having 1 to 6 carbon atoms or taken together may form a 5- or 6-membered ring; or an acid addition salts of said compound wherein R.sup.1 represents a hydrogen atom or X.sup.2 represents an alkylene group having an amino group, or salts of said compound wherein R.sup.5 represents a hydrogen atom.The compounds represented by the above formula or their pharmaceutically acceptable salts are useful as anti-ulcer agents.The present invention also provides a process for producing the compounds or their pharmaceutically acceptable salts, which comprises acylating a protected derivative at the amino group of a corresponding acid halide with a corresponding substituted benzene in the presence of a Lewis acid; or reducing a corresponding compound in the presence of an inert solvent under conditions which induce reduction of the carbonyl group of said corresponding compound without substantially reducing the phenylene group of said corresponding compound; or dehydrating a corresponding compound.
摘要:
Disclosed is a fused pyrimidine of the formula [I] ##STR1## wherein R.sup.1, R.sup.2, and R.sup.3 are as defined in the specification, Y represents a linking group of the formula ##STR2## wherein n is an integer of from 4 to 6, ##STR3## wherein A is a hydrogen atom or alkyl group; and Z represents a hydrogen atom, or other substituents; or Y and Z together represent an unsubstituted or substituted alkyl, alkenyl or arylalkyl group; or a 5- to 7-member heterocyclic ring which has a nitrogen atom, and further, an oxygen or sulfur atom as a hetero atom other than the nitrogen atom, being bonded via the nitrogen atom therein to the 4-position of the pyrimidine ring of the formula (I), a 5- to 7-member unsaturated heterocyclic ring which has 1 to 3 nitrogen atoms being bonded via the nitrogen atom therein to the 4-position of the pyrimidine ring of the formula (I), or a fused biheterocyclic ring constructed with 5- or 6-membered aromatic or non-aromatic rings, which has 1 to 3 nitrogen atoms in any position, being bonded via the nitrogen atom therein to the 4-position of the pyrimidine ring of the formula (I); andm is an integer of from 1 to 3;and a pharmaceutically acceptable acid addition salt thereof, as well as a process for producing same and a pharmaceutical preparation useful for a treatment of hypoxemia associated with respiratory diseases.