C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
260/386, 260/466
C07C 309/52 (2006.01) C07C 303/32 (2006.01) C07D 295/14 (2006.01) C07F 9/54 (2006.01) C07C 309/42 (2006.01)
Patent
CA 2002641
C 6066 (R) ABSTRACT OF THE DISCLOSURE A process is provided for obtaining quaternary ammonium or phosphonium substituted carbonic acid esters. The first step involves reacting the hydroxyl predecessor compound of the ester with phosgene in an aprotic organic solvent to obtain a solution of chloroformate/ hydrogen chloride complex. In a second step, the chloroformate/hydrogen chloride complex in solution is admixed with a salt whose conjugate anion, normally a phenol sulphonate, has structure L. During the admixing step, the pH is maintained no lower than 6 until all reactants have been combined to form the product ester. Thereupon, the pH is lowered to less than 5.5 to stabilize the product against hydrolysis.
Bonn Jeffrey
Gutierrez Eddie N.
Madison Stephen A.
Bereskin & Parr
Bonn Jeffrey
Gutierrez Eddie N.
Madison Stephen A.
Plc Unilever
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