Heterocyclic Carbon Compound Containing A Hetero Ring Having Chalcogen Or Nitrogen As The Only Ring Hetero Atoms Patents (Class 44/329)
Compound of indeterminate structure prepared by reacting a heterocyclic compound of known structure (Class 44/330)
The hetero ring contains six members including nitrogen and carbon (Class 44/333)
The hetero ring contains five members including nitrogen and carbon (e.g., pyrrolidones, porphines, etc.) (Class 44/340)
The hetero ring contains six members including carbon and chalcogen (e.g., six-membered sorbitans, ketone peroxides, etc.) (Class 44/349)
The hetero ring contains five members including carbon and chalcogen (Class 44/350)
The hetero ring contains three or four members (Class 44/353)
  • Carbamates, their production and use as fuels additives
    Patent number: 5103041
    Abstract: A process for the production of a carbamate having formula (I), wherein X and Y are independently either hydrogen, a hydrocarbyl group or a hetero-substituted hydrocarbyl group or the group of formula (II), wherein Z is either a divalent hydrocarbyl, a substituted hydrocarbyl group or the group of formula (III) [(alkylene)m(NH)n(alkylene)m] in which n=0 to 4 and m=1 to 4, and R is a hydrocarbyl or substituted hydrocarbyl group, provided that if either one of X or Y is the group of formula (II), the other of X or Y is hydrogen, which process comprises reacting a compound of formula (IV), wherein X and Y are independently either hydrogen, a hydrocarbyl group or a hetero-substituted hydrocarbyl group with a dihydrocarbyl carbonate having formula (V), wherein independently R is as defined above in the presence as catalyst of a strong organic base and in the proportions necessary to produce either a mono-carbamate or a bis-carbamate.
    Type: Grant
    Filed: January 31, 1989
    Date of Patent: April 7, 1992
    Assignee: BP Chemicals Limited
    Inventors: Richard A'Court, William J. Fox, John E. Hamlin, Sean P. O'Connor