申请人:Sucreries du Soissonnais et Compagnie Sucriere
公开号:US04332959A1
公开(公告)日:1982-06-01
The process is for the manufacture of phenoxylactic acids and their derivatives of the general formula: ##STR1## (in which R.sub.1 and R.sub.2, identical or different, can represent hydrogen atoms, methyl residues, methoxy groups or halogens; Y represents an OH or O--CO--R.sub.3 group with R.sub.3 representing either an aliphatic residue possibly substituted by a halogen, or an aromatic residue possibly substituted on the nucleus by one or several methyl, methoxy, halogen groups or lastly a heterocyclic group; Z represents OH group or an ##STR2## with R.sub.4 representing an alkyl or aryl radical and R.sub.5 hydrogen or an alkyl radical, NR.sub.4 R.sub.5 possibly also representing the morpholinyl radical). A cyanhydrin is subjected to a Ritter reaction (reaction with tert. butanol or isobutene in the presence of an acid). The resulting compound is hydrolyzed to obtain the corresponding acid, and if desired, this acid is subjected to conventional reactions for preparing ester-acids, ester-amides or corresponding amides.
该过程用于制造苯氧乙酸及其衍生物,其一般结构式为:##STR1##(其中R.sub.1和R.sub.2,相同或不同,可以代表氢原子、甲基残基、甲氧基团或卤素;Y代表一个OH或O--CO--R.sub.3基团,其中R.sub.3代表一个可能被卤素取代的脂肪残基,或者一个可能在核上被一个或多个甲基、甲氧基、卤素基取代的芳香残基,最后是一个杂环基团;Z代表一个OH基团或一个##STR2##,其中R.sub.4代表一个烷基或芳基基团,R.sub.5代表氢或一个烷基基团,NR.sub.4 R.sub.5也可能代表吗啡基团)。氰水合物经过里特反应(在酸的存在下与叔丁醇或异丁烯反应)。得到的化合物经水解得到相应的酸,如果需要,这种酸将经过常规反应制备酯酸、酯酰胺或相应酰胺。