And Chalcogen Bonded Directly To The Other Ring Carbon Of The Five-membered Hetero Ring Which Is Adjacent To The Ring Nitrogen (e.g., Succinimide, Etc.) Patents (Class 548/545)
Nitrogen attached directly or indirectly to the five-membered hetero ring by acyclic nonionic bonding (Class 548/546)
Chalcogen attached indirectly to the five-membered hetero ring by acyclic nonionic bonding (Class 548/547)
Carbon to carbon unsaturation between ring members of the five-membered hetero ring (e.g., maleimide, etc.) (Class 548/548)
  • Process for preparing 4,5,6,7-tetrahydro-7-oxobenzo[b]thiophenes and 1,2,3,4-tetrahydro-4-oxonaphthalenes
    Patent number: 4332724
    Abstract: 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.
    Type: Grant
    Filed: November 16, 1977
    Date of Patent: June 1, 1982
    Assignee: American Cyanamid Co.
    Inventors: Terence J. Bentley, William H. Gastrock, Goro Asato