申请人:American Cyanamid Co.
公开号:US04332724A1
公开(公告)日:1982-06-01
There is provided a process for the preparation of an amido or an ureido derivative of certain 4,5,6,7-tetrahydro-7-oxobenzo[b]thiophenes or certain 1,2,3,4-tetrahydro-4-oxonaphthalenes which can be employed as an animal growth regulant. The process comprises: oxidizing in the presence of a cobalt catalyst a compound having the formula: ##STR1## wherein R.sub.1 and R.sub.2 are each a substituent selected from the group consisting of alkanoyl C.sub.1 -C.sub.7, halogen-substituted alkanoyl C.sub.1 -C.sub.7, carboalkoxy C.sub.1 -C.sub.4, ##STR2## and ##STR3## R.sub.3 is selected from the group consisting of hydrogen and alkyl C.sub.1 -C.sub.4 ; R.sub.4 is selected from the group consisting of hydr ogen, alkyl C.sub.1 -C.sub.8, alkanoyl C.sub.2 -C.sub.4, halogen-substituted alkanoyl (C.sub.2 -C.sub.4), and ##STR4## and when the ##STR5## moiety is cyclized each represents a moiety selected from the group consisting of succinimido, maleimido and phthalimido; X and Y are each a radical selected from the group consisting of hydrogen, fluorine, chlorine, bromine, iodine, nitro, alkyl C.sub.1 -C.sub.4 ; the racemic mixtures and the optical isomers thereof.
提供了一种制备某些4,5,6,7-四氢-7-氧代苯并[b]噻吩或某些1,2,3,4-四氢-4-氧代萘的酰胺或脲衍生物的方法,该方法可用作动物生长调节剂。该方法包括:在钴催化剂存在下氧化具有以下式子的化合物:##STR1##其中R.sub.1和R.sub.2分别是从羧酸C.sub.1-C.sub.7,卤代烷基C.sub.1-C.sub.7,羧甲氧基C.sub.1-C.sub.4,##STR2##和##STR3##组成的取代基;R.sub.3选自氢和烷基C.sub.1-C.sub.4;R.sub.4选自氢,烷基C.sub.1-C.sub.8,酰基C.sub.2-C.sub.4,卤代酰基(C.sub.2-C.sub.4)和##STR4##当##STR5##基团环化时,每个基团代表从琥珀酰亚胺基,马来酰亚胺基和邻苯二甲酰亚胺基组成的基团;X和Y分别是从氢,氟,氯,溴,碘,硝基,烷基C.sub.1-C.sub.4组成的基团,其为外消旋混合物和其光学异构体。