Appeal No. 1995-1539
Application No. 07/950,388
column 3, lines 2-3. To the resulting reaction mixture
containing the phenolate (deprotected phenol) formed from 4-
acetoxystyrene and a base, a phase transfer catalyst and an
alkoxycarbonylation agent in a solvent are added. See column
3, lines 19-22. “The reaction of the phenolate formed in situ
with the alkoxycarbonylation agent is conducted at a
temperature of 110 C to about 30 C . . . .” See column 3,o o
lines 45-48 and column 2, lines 37-40. The preferred
alkoxycarbony-
lation agent employed is di-t-butyldicarbonate (a
dicarbonate). See column 3, line 32. Once the desired
alkoxycarbonyloxystyrene (substituted 4-hydroxystyrene) is
formed, “additional organic solvent is added to aid in easy
separation of the organic phase [from the aqueous phase].”
See column 3, lines 53-57 and 63-68. The desired
alkoxycarbonyloxystyrene may be subsequently “isolated using
conventional known techniques, such as distillation.” See
column 3, lines 58-61. If desired, however, the desired
alkoxycarbonyloxystyrene is derivatized directly (chemically
reacted directly) “in the organic phase after separation
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