An improved method for the preparation of 3,5-diaminopyrazinoic acid (which is useful for the manufacture of diuretics) is described. New compounds obtained in the process include 3,5-diamino-2,6-dicarbamoylpyrazine; 3.5-diamino-6-carbamoylpyrazinoic acid and 3,5-diamino-6-carbamoylpyrazine. The latter compounds are also useful as curing agents for epoxy resins.
The present invention provides an antifungal agent represented by the formula:
[wherein A
1
represents a 3-pyridyl group which may have a substituent, a quinolyl group which may have a substituent, or the like; X
1
represents a group represented by the formula —NH—C(═O)—, a group represented by the formula —C(═O)—NH—, or the like; E represents a furyl group, a thienyl group, a pyrrolyl group, a phenyl group, a pyridyl group, a tetrazolyl group, a thiazolyl group or a pyrazolyl group; with the proviso that A
1
may have 1 to 3 substituents, and E has one or two substituents].
Disclosed is an antimalarial agent containing a compound represented by the formula:
[wherein A
1
represents a 3-pyridyl group that may have a substituent, a 6-quinolyl group that may have a substituent, or the like; X
1
represents a group represented by the formula —C(═O)—NH— or the like; E represents a furyl group, a thienyl group or a phenyl group;
with the proviso that A
1
may have one to three substituents, and E has one of two substituents] or a salt thereof or hydrates thereof.
The present invention provides an antifungal agent represented by the formula:
[wherein A1 represents a 3-pyridyl group which may have a substituent, a quinolyl group which may have a substituent, or the like; X1 represents a group represented by the formula —NH—C(═O)—, a group represented by the formula —C(═O)—NH—, or the like; E represents a furyl group, a thienyl group, a pyrrolyl group, a phenyl group, a pyridyl group, a tetrazolyl group, a thiazolyl group or a pyrazolyl group; with the proviso that A1 may have 1 to 3 substituents, and E has one or two substituents].