ALEXANDER FUNG, PHARM.D.
Pharmacy at Eureka Rd, Roseville, CA
License number
California 71032
Category
Pharmacy
Type
Pharmacist
Address
Address
2
1600 Eureka Rd, Roseville, CA 95661
4416 Capitol Ct, Concord, CA 94518
4416 Capitol Ct, Concord, CA 94518
Phone
(925) 890-0601
Professional information
Chlorine Exchange For Fluorine In Ring-Fluorinated Pyridine Compounds
US Patent:
4546192, Oct 8, 1985
Filed:
Sep 23, 1982
Appl. No.:
6/422318
Inventors:
George S. Fujioka - Walnut Creek CA
Alexander P. Fung - Pleasant Hill CA
Alexander P. Fung - Pleasant Hill CA
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
C07D21326
US Classification:
546345
Abstract:
Ring-fluorinated pyridine compounds are contacted with a chlorinating agent, preferably in the presence of a catalyst, under favorable conditions to yield pyridine compounds having a chlorine substituted in the ring-fluorine position(s).
Liquid Phase Halogen Exchange Of (Trichloromethyl) Pyridines To (Trifluoromethyl)Pyridines
US Patent:
4567273, Jan 28, 1986
Filed:
Mar 14, 1984
Appl. No.:
6/589433
Inventors:
Alexander P. Fung - Pleasant Hill CA
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
C07D21326
US Classification:
546345
Abstract:
(Trifluoromethyl)pyridine compounds are prepared in high yields and with a high selectivity by using a mercury or silver fluorinating agent, i. e. , HgF. sub. 2, AgF, AgF. sub. 2, in a liquid phase halogen exchange process.
Preparation Of (Trifluoromethyl)Pyridines Under Liquid Phase Conditions
US Patent:
4590279, May 20, 1986
Filed:
Aug 4, 1983
Appl. No.:
6/520399
Inventors:
Alexander P. Fung - Pleasant Hill CA
Charles A. Wilson - Pittsburg CA
Charles A. Wilson - Pittsburg CA
Assignee:
The Dow Chemical Company - Midland MI
International Classification:
C07D21326
US Classification:
546345
Abstract:
(Trifluoromethyl)pyridine compounds are prepared by contacting (trichloromethyl)pyridine compounds with hydrogen fluoride in the presence of a catalytic amount of a catalyst selected from the group consisting of FeCl. sub. 2, FeF. sub. 2 and mixtures thereof under liquid phase conditions. The (trifluoromethyl)pyridine compounds are useful as intermediates for the preparation of agricultural chemicals.