Ring closure of aromatic compounds with the aid of hydrofluoric acid
United States Patent 2174118

Inventors:
Calcott, William S.
Tinker, John M.
Linch, Adrian L.
Publication Date:
09/26/1939
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Assignee:
Pont DU.
Primary Class:
546/103
Other Classes:
552/271, 552/263, 548/356.500, 552/265, 423/483, 552/220, 552/221, 546/36, 552/238, 549/45
International Classes:
C07C46/00