Organic compounds -- part of the class 532-570 series – Organic compounds – Carboxylic acid esters
Reexamination Certificate
2007-01-09
2007-01-09
Zucker, Paul A. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Carboxylic acid esters
Reexamination Certificate
active
10886724
ABSTRACT:
In its several embodiments, this invention discloses a novel process to prepare the compounds of Formula 3:wherein R1is lower alkyl, and R2and R3can be the same or different, each being independently selected from the group consisting of alkyl, aryl and aralkyl; said process being carried out in a suitable solvent with at least one tert-amine carboxylate salt catalyst. The compounds of formula 3 are chemical intermediates useful for the synthesis of various heterocyclic compounds. These heterocyclic compounds are in turn useful precursors for diverse pharmaceutical, herbicidal and insecticidal agents. In particular, these intermediates are useful precursors to a variety of CCR5 inhibitors.
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Fischer H. Eric
Schering Corporation
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