Substituted 2-aminoalk-3-enoic acid derivative of formula I ##STR1## wherein R.sub.1 is an aliphatic hydrocarbon radical that is substituted by optionally acylated or aliphatically or araliphatically etherified hydroxy, by halogen, by optionally acylated and/or aliphatically substituted amino or by an aza-, diaza-, azoxa- or oxa-cycloaliphatic radical, or is an oxacycloaliphatic hydrocarbon radical bonded via a carbon atom, or is an optionally aliphatically N-substituted or N-acylated azacycloaliphatic hydrocarbon radical, and R.sub.2 is free or esterified carboxy, and their salts exhibit NMDA-antagonistic properties and are useful as active ingredients of anticonvulsive medicaments.
Process for preparing .alpha., .beta.-unsaturated aldehydes
申请人:Kuraray Company Ltd.
公开号:US04745229A1
公开(公告)日:1988-05-17
A process for preparing .alpha.,.beta.-unsaturated aldehydes of the general formula (I) ##STR1## in which R.sup.1, R.sup.2 and R.sup.3 are independently a hydrogen atom, or an alkyl or alkenyl group with or without being substituted with a lower acyloxy group. The aldehyde of the general formula (I) is prepared by reaction between an allylic chloride of the following general formula (IIa) ##STR2## in which R.sup.1, R.sup.2 and R.sup.3 have, respectively, the same meanings as defined above, and an amine oxide selected from the group consisting of tri(lower alkyl)amine N-oxides of the formula, R.sub.3.sup.4 N.sup.+ O.sup.-, in which R.sup.4 represents a lower alkyl group having from 2 to 4 carbon atoms, and N-lower alkylmorpholine N-oxides of the following formula ##STR3## in which R.sup.5 represents a lower alkyl group having from 1 to 4 carbon atoms. Alternatively, the aldehyde of the formula (I) is obtained by reaction between an allylic chloride of the following general formula (IIb) ##STR4## in which R.sup.1, R.sup.2 and R.sup.3 have, respectively, the same meanings as defined above, and an amine oxide selected from the group consisting of tri(lower alkyl)amine N-oxides of the formula, R.sub.3.sup.4 N.sup.+ O.sup.-, in which R.sup.4 has the same meaning as defined above, and N-lower alkylmorpholine N-oxides of the following formula ##STR5## in which R.sup.5 has the same meaning as defined above, in the presence of an alkali metal iodide or a copper halide.
Preparation of carboxylic acid esters of .gamma.-hydroxy-tiglic-aldehyde from bismonocarboxylic acid esters of but-2-en-1,4-diol via 1,4-diacetoxy-2-formyl butane including intermediates in this synthesis.