2-substituted-1,3-propylidenediphosphonate derivatives, and the process for their preparation
CA 1284320 C · Owner: Kalathakis, Kyriacos · Inventors: Rossier, Jean-Robert; Trung Phan, Hieu; Nguyen Mong, Lan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
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The invention relates to a novel class of compounds, 2-substituted 1,3-diphosphonate derivatives of formula (I):, (I), where R1 and R2, identical or different are hydrogen, sodium, potassium, magnesium ammonium, substituted ammonium, groups alkyl groups from 1 to 8 carbon atoms, alkenyl or alkynyl groups from 2 to 8 carbon atoms or cyclopentyl, cyclopentylmethyl, cyclohexyl cyclohexyl-methyl, phenyl, benzyl, CH2CH2OCH3 CH2CH2OCH2CH3, CH2CH2OH, CH2CH2NMe2, and A is selected from the group consisting of: CbH2b+1 , , , , , , , , , , , , , , , , , where b is an integer from 3 to 16 m is zero or 1, n is an, integer from zero to 8 k is an integer from zero to 4, t is, an integer from 1 to 4 X, Y …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted May 21, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 21, 2008.
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