Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2006-08-01
2006-08-01
Witherspoon, Sikarl A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S388000, C568S391000, C556S041000, C556S042000, C556S051000, C556S057000
Reexamination Certificate
active
07084306
ABSTRACT:
Disclosed is a process for preparing 2,2,6,6-tetramethyl-3,5-heptanedione, comprising reacting a pivalic acid alkyl ester with pinacolone in the presence of an alkali metal alkoxide catalyst using a pivalic acid alkyl ester as a solvent but using no other solvent or reacting them in an amide type or urea type solvent in the presence of an alkali metal alkoxide catalyst. Also disclosed is a process for preparing a 2,2,6,6-tetramethyl-3,5-heptanesione metal complex using the 2,2,6,6-tetramethyl-3,5-heptanedione obtained by the above process. The process for preparing 2,2,6,6-tetramethyl-3,5-heptanedione is an industrially advantageous process in which an alkali metal alkoxide that is easy to handle can be used as a catalyst for preparing 2,2,6,6-tetramethyl-3,5-heptanedione from a pivalic acid alkyl ester and pinacolone.
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Saito Makoto
Tani Takashi
Ueda Takashi
Showa Denko K.K.
Sughrue & Mion, PLLC
Witherspoon Sikarl A.
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