Patents Represented by Attorney James W. Williams

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  • Synthesis of sulfilimines
    Patent number: 4578514
    Abstract: Processes are disclosed for preparation of N-aryl-S,S-dihydrocarbylsulfilimines by reaction of phenylisocyanate compounds with hydrocarbyl sulfoxides. The sulfilimines can be rearranged to ortho-thioalkylene anilines and the reactions can be employed in a route for converting nitrobenzene compounds to ortho-thioalkylene anilines, which are useful intermediates for preparation of herbicidal compounds.
    Type: Grant
    Filed: November 1, 1984
    Date of Patent: March 25, 1986
    Assignee: Monsanto Company
    Inventor: Daniel P. Getman
  • Hydrogenolysis of hydrobenzoins
    Patent number: 4087463
    Abstract: Hydrogenolysis of hydrobenzoins [1,2-bis(aryl)ethane-1,2-diols] in the presence of a catalyst comprising cobalt carbonyl yields 1,2-bis(aryl)ethanes. The process is particularly directed to the production of 1,2-bis(4-hydroxyphenyl)ethane from 4,4-dihydroxyhydrobenzoin [1,2-bis(4-hydroxyphenyl)ethane-1,2-diol].
    Type: Grant
    Filed: December 22, 1976
    Date of Patent: May 2, 1978
    Assignee: Monsanto Company
    Inventors: Denis Forster, George F. Schaefer
  • Electrolytic reductive coupling of hydroxybenzaldehydes
    Patent number: 4087336
    Abstract: Electrolytic reductive coupling of hydroxybenzaldehydes in an aqueous alkaline electrolysis medium in an undivided electrolytic cell yields 1,2-bis(hydroxyphenyl)ethane-1,2-diols.
    Type: Grant
    Filed: December 27, 1976
    Date of Patent: May 2, 1978
    Assignee: Monsanto Company
    Inventor: John H. Wagenknecht