Abstract: An alkoxyvinyl ether is disclosed having the chemical structure RfC(OR)?CHRf?, wherein Rf is an at least partially fluorinated functional group having at least one carbon atom, Rf? is an at least partially fluorinated functional group having at least two carbon atoms, and R is a functional group. A method for preparing an alkoxyvinyl ether is disclosed, comprising RfCFHCFHRf?+KOH/ROH?RfC(OR)?CHRf?, wherein Rf is a perfluoro functional group, Rf? is a perfluoro functional group, and R is an alkyl functional group. Another method for preparing an alkoxyvinyl ether is disclosed, comprising RfCF?CHRf?+KOH/ROH?RfC(OR)?CHRf?, wherein Rf is a perfluoro functional group, Rf? is a perfluoro functional group, and R is an alkyl functional group.
Type:
Grant
Filed:
October 10, 2019
Date of Patent:
May 30, 2023
Assignee:
THE CHEMOURS COMPANY FC, LLC
Inventors:
Viacheslav A Petrov, Mario Joseph Nappa, Robert D Lousenberg, Jonathan P Stehman
Abstract: The present invention provides a water-soluble fluorescent compound of resveratrone 6-O-?-glucoside [(E)-4-(8-hydroxy-6-(((2S,3R,4S,5S,6R)-3,4,5-trihydroxy-6-(hydroxymethyl)tetrahydro-2H-pyran-2-yl)oxy)naphthalen-2-yl)but-3-en-2-one] and its derivatives of Formula 1 which have at least one water-soluble substituent, and a method for preparing the same by a photochemical reaction of resveratrol 3-O-?-glucoside and its derivatives of having Formula 3 which are not fluorescent. Said new water-soluble fluorescent compounds has single-photon absorptive characteristics and/or two-photon absorptive characteristics as well as no or little toxicity, and can be usefully utilized in fields that requires water-soluble fluorescent characteristics (diagnosis, fluorescent probe, in vivo imaging, display, etc.).
Type:
Application
Filed:
September 5, 2012
Publication date:
January 29, 2015
Inventors:
Seong Keun Kim, Seung Yang, Seon JIn Hwang, Jung Eun Lee, Jong Woo Lee, Jun Hee Kang, Eun Hak Lim
Abstract: The present invention relates to “a microwave induced process for the preparation of 4-vinylphenols or its derivatives” in which commercially important FEMA GRAS approved perfumery and flavouring vinylphenols (i.e. hydroxystyrenes) namely 4-vinylguaiacol (FEMA GRAS No. 2675) and 4-vinylphenol (FEMA GRAS No. 3739) as well as other useful vinylphenols such as 2,6-dimethoxy-4-vinylphenol, 2-hydroxy-4-vinylphenol, 3-hydroxy-4-vinylphenol etc. by condensation of malonic acid and 4-hydroxyphenylaldehydes or its derivatives.
Type:
Grant
Filed:
March 7, 2003
Date of Patent:
January 24, 2006
Assignee:
Council of Scientific and Industrial Research
Abstract: The subject invention relates to a process for the trifluoromethylation of sulfates, including cyclic and acyclic sulfates. The subject invention further pertains to the compounds produced by the trifluoromethylation of sulfates.
Abstract: A process for preparing isoflurane (1-chloro-2,2,2-trifluoroethyl difluoromethyl ether) by reacting PFE (2,2,2-trifluoroethyl difluoromethyl ether) with chlorine in the presence of ultraviolet light and added water, at a low temperature and/or at a high conversion.
Type:
Grant
Filed:
August 21, 2000
Date of Patent:
April 22, 2003
Inventors:
William J. O'Donnell, Paul Mazzell, Jr., Lee G. Sprague, Arthur J. Elliott