Abstract: A process for preparing N-substituted amino acid esters having the formula (I): ##STR1## wherein R.sub.1 and R.sub.4, the same or different, are an alkyl, aralkyl, cycloalkyl or aryl group; and R.sub.2 and R.sub.3, the same or different,are an alkyl, aralkyl, aryl, heterocycle-alkyl, aminoalkyl or guanidylalkyl, by the reaction of .alpha.-amino acid esters with .alpha.-substituted carboxylic acid esters, under the condition of substantially free from solvent, which can afford their optical isomers in a good yield.

Abstract: A compound of the formual (I) ##STR1## or 1-oxide or salt thereof, whereinR.sub.1 is a C.sub.1-11 alkyl group, a lower alkenyl group, a phenyl or group which may be substituted, an aralkyl group whose nucleus may be substituted, a haloalkyl or a 5- or 6-membered heterocycle group;R.sub.2, R.sub.3, R.sub.4, R.sub.5 and R.sub.6 are, the same or different, hydrogen atom, a halogen atom, cyano group, nitro group, amino group, a lower alkyl group, a lower haloalkyl group, hydroxy group, a lower alkoxy group, an aryloxy group, carboxy group or a lower alkoxycarbonyl group;R.sub.7 is hydrogen atom, a halogen atom, a lower alkyl group, a phenyl group which may be substituted, an aralkyl group whose nucleus may be substituted, a lower alkenyl group, a lower alkynyl group, a lower alkoxy group or a haloalkyl group;R.sub.8 is a C.sub.

Abstract: A compound of the formula (I) ##STR1## or a salt thereof, wherein R is hydrogen atom, or a group of --(CH.sub.2).sub.n --R.sub.1 wherein n is an integer from 1 to 3 and R.sub.1 is hydrogen atom, hydroxy group, a lower alkoxy group, mercapto group, a lower alkylthio group, amino group, a di-lower alkylamino group, a C.sub.3-11 alkyl group, a lower alkenyl group, a lower alkynyl group, a cycloalkyl group, a 5- or 6-membered heterocyclic group, or a phenyl group which may be substituted by one or two substituents of a halogen, a lower alkyl or a lower alkoxy;R.sub.2 and R.sub.7 are the same, a C.sub.1-11 alkyl group, a lower alkenyl group, a lower alkynyl group, a cycloalkyl group, a lower alkoxyalkyl group, an aralkyl group whose nucleus may be substituted by one or two substituents of a halogen, a lower alkyl or a lower alkoxy, or a halalkyl group;R.sub.3, R.sub.4 and R.sub.

Abstract: A compound of the formula (I) ##STR1## or a salt thereof, wherein R is hydrogen atom, phenyl group which may be substituted freely or a group of --(CH.sub.2).sub.n --R.sub.1 wherein n is an interger from 1 to 3 and R.sub.1 is hydrogen atom, hydroxy group, lower alkoxy group, mercapto group, lower alkylthio group, amino group, di-lower alkylamino group, C.sub.3-11 alkyl group, lower alkenyl group, lower alkynyl group, cycloalkyl group, 5- or 6-membered heterocyclic group, or phenyl group which may be substituted by one or two substituents of halogen, lower alkyl or lower alkoxy;R.sub.2 and R.sub.7 are different, hydrogen atom, C.sub.1-11 alkyl group, lower alkenyl group, lower alkylyl group, cycloalkyl group, lower alkoxyalkyl group, lower alkylthioalkyl group, phenyl group which may be substituted freely, aralkyl group whose nucleus may be subsituted by one or two substituents of halogen, lower alkyl or lower alkoxy or haloalkyl group or 5- or 6-membered heterocyclic group;R.sub.3, R.sub.4 and R.sub.

Abstract: A compound of the formula (I) ##STR1## where A is an alkylene or alkenylene group, R.sub.1 is an aryl group which may be substituted, R.sub.2 is a hydrogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group, a halogenated lower alkyl group, a cycloalkyl group, a lower alkoxyalkyl group, a lower alkylthioalkyl group, a phenyl group which may be substituted or an aralkyl group which may be substituted, R.sub.3 is a hydrogen atom, a halogen atom, a lower alkyl group, a lower alkenyl group, a lower alkynyl group or a halogenated lower alkyl group, or R.sub.2 and R.sub.3 may be combined to form a group of --(CH.sub.2).sub.n --(n is 3 or 4), or salt thereof, which is useful as a herbicide.

Abstract: A compound of the formula (I) ##STR1## wherein (1) when R.sub.1 is a C.sub.2-11 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, an aralkyl which may be substituted, a lower haloalkyl or a 5 or 6 membered heterocycle;R.sub.2, R.sub.3 and R.sub.4 are the same or different, hydrogen, a halogen, cyano, nitro, amino, a lower alkyl, a lower haloalkyl, hydroxy, a lower alkoxy, an aryloxy, carboxy, or a lower alkoxycarbonyl;R.sub.5 is hydrogen, a halogen, a C.sub.1-11 alkyl, an aryl which may be substituted, an aralkyl which may be substituted;R.sub.6 is a C.sub.1-11 alkyl, a lower alkenyl, a lower alkynyl, a cycloalkyl, a lower alkoxyalkyl, an aryl which may be substituted, an aralkyl which may be substituted, a lower haloalkyl, or a 5 or 6 membered heterocycle; or R.sub.5 and R.sub.6 may be combined to form a group of --(CH.sub.2).sub.m -- (m is 3 or 4);(2) when R.sub.1 is an aryl which may be substituted;R.sub.2, R.sub.3, R.sub.4 and R.sub.5 have the same meanings as defined above; R.

Abstract: A compound of the formula (I) ##STR1## or a salt thereof, wherein R is hydrogen atom, phenyl group which may be substituted freely or a group of --(CH.sub.2).sub.n --R.sub.1 wherein n is an interger from 1 to 3 and R.sub.1 is hydrogen atom, hydroxy group, lower alkoxy group, mercapto group, lower alkylthio group, amino group, di-lower alkylamino group, C.sub.3-11 alkyl group, lower alkenyl group, lower alkynyl group, cycloalkyl group, 5- or 6-membered heterocyclic group, or phenyl group which may be substituted by one or two substituents of halogen, lower alkyl or lower alkoxy; R.sub.2 and R.sub.7 are different, hydrogen atom, C.sub.1-11 alkyl group, lower alkenyl group, lower alkynyl group, cycloalkyl group, lower alkoxyalkyl group, lower alkylthioalkyl group, phenyl group whch may be substiuted freely, aralkyl group whose nucleus may be substituted by one or two substituents of halogen, lower alkyl or lower alkoxy or haloalkyl gorup or 5- or 6-membered heterocyclic group; R.sub.3, R.sub.4 and R.sub.

Abstract: Novel 5-halopyridine-3-carboxamide compounds having the general formula (I) ##STR1## or salts thereof wherein R is hydrogen atom or a group of --(CH.sub.2).sub.n --R.sub.1 wherein n is an integer from 1 to 4 and R.sub.1 is hydrogen atom, hydroxy group, lower alkoxy group, mercapto group, lower alkylthio group, amino group, di-lower alkylamino group, C.sub.1-11 alkyl group, lower alkenyl group, lower alkynyl group, cycloalkyl group, 5- or 6-membered heterocyclic group or aryl group which may be substituted by one or two substituents of halogen, lower alkyl or lower alkoxy;R.sub.2 and R.sub.3 are, the same of different, hydrogen atom, halogen atom, cyano group, nitro group, amino group, lower akyl group, halogenated lower alkyl group, hydroxy group, lower alkoxy group, aryloxy group, carboxy group or lower alkoxycarbonyl group;X is halogen atom; which compounds possess growth inhibitory activities and also anti-inflammatory activity.

Abstract: Novel pyridinecarboxamide derivatives having the general formula (I) ##STR1## or salts thereof wherein R is hydrogen atom, alkoxy group, aralkyloxy group or a group of --(CH.sub.2).sub.n --R.sub.1 wherein n is an interger from 1 to 3 and R.sub.1 is hydrogen atom, hydroxy group, lower alkoxy group, mercapto group, lower alkylthio group, amino group, di-lower alkylamino group, C.sub.3-11 alkyl group, lower alkenyl group, lower alkynyl group, cycloalkyl group, 5- or 6-membered heterocyclic group, or aryl group which may be substituted by one or two substituents of halogen, lower alkyl or lower alkoxy;R.sub.2 is halogen atom, lower alkyl group, hydroxy group, lower alkoxy group, aryloxy group, carboxy group or lower alkoxycarbonyl group;R.sub.3 is hydrogen atom, halogen atom or lower alkyl group, which possess plant growth inhibitory activities and also anti-inflammatory activity.

Abstract: A new process for preparing a pyrone-3-carboxamide compound of the formula (IV): ##STR1## wherein R.sub.1 is aryl or heterocyclic group optionally substituted, R.sub.2 is alkyl, aralkyl or like group, comprising reacting a compound of the formula (I) or (I'): ##STR2## wherein R.sub.3 is dialkylamino group and n is 0 to 6, and R.sub.1 and R.sub.2 are as above,with a compound of the formula (II): ##STR3## wherein R.sub.4 and R.sub.5 are hydrogen atom, alkyl or like group, or reacting a compound of the formula (III): ##STR4## wherein R.sub.6 is alkyl, aryl or like group, and R.sub.1 and R.sub.2 are as above,with a compound of the formula (II) or diketene in the presence of a tertiary organic base.

Abstract: A pyrone-3-carboxamide compound of the formula (I): ##STR1## in which R.sub.1 is an alkyl group, and R.sub.2 is an alkyl group or a halogen atom, which is useful as a medicine and an agricultural chemical or an intermediate thereof.

Abstract: A compounds of the general formula (I): ##STR1## wherein R.sup.1 is alkyl, lower alkenyl, lower alkynyl, aralkyl, haloalkyl, lower alkoxy-lower alkyl, lower alkylthio-lower alkyl or lower alkoxycarbonyl-lower alkyl group; R.sup.2 is aryl group which may be substituted by one or more groups of halogen atom, lower alkyl, lower alkoxy, lower alkoxycarbonyl, trifluoromethyl, cyano and nitro group; R.sup.3 and R.sup.4 are, the same or different, lower alkyl, aralkyl, haloalkyl or cycloalkyl, or aryl group which may be substituted by one or more groups of halogen atom, lower alkyl, lower alkoxy, trifluoromethyl, cyano or nitro group; R.sup.5 is hydrogen atom, halogen atom, lower alkyl, phenyl which may be substituted or aralkyl which may be substituted; or R.sup.4 and R.sup.5 may be combined to form a group of --(CH.sub.2).sub.n - in which n is 3 or 4, or its 1-oxide or addition salt. which is useful as a plant growth inhibitory agent.

Abstract: Novel pyridinecarboxamide compounds having the general formula (I) ##STR1## or salts thereof wherein R is alkoxy group, aralkyloxy group or a group of --(CH.sub.2).sub.n --R.sub.1 wherein n is an integer from 1 to 3 and R.sub.1 is hydroxy group, lower alkoxy group, mercapto group, lower alkylthio group, amino group, di-lower alkylamino group, C.sub.3-11 alkyl group, lower alkenyl group, lower alkynyl group, cycloalkyl group, 5- or 6-membered heterocyclic group, or aryl group substituted by one or two substituents of halogen, lower alkyl or lower alkoxy; R.sub.2 and R.sub.3 bond at the 3,4 or 5 position of benzene ring and are, the same or different, hydrogen atom, halogen atom, cyano group, nitro group, amino group, lower alkyl group, halogenated lower alkyl group, hydroxy group, lower alkoxy group, aryloxy group, carboxy group or lower alkoxycarbonyl group, which possess plant growth inhibitory activities and also antiinflammatory activity.