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US 12,630,491 B2Granted
Production of 2,2,4,4-tetramethylcyclobutane-1,3-diol from secondary alcohols and 2,2,4,4-tetramethylcyclobutanedione using homogeneous catalysts
AssigneeEastman Chemical Company
InventorsMesfin Ejerssa Janka, Robert Thomas Hembre, Scott Donald Barnicki, Robert Sterling Kline, Stephanie Rollins Testerman
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Abstract
Disclosed is a process for preparing 2,2,4,4-tetramethylcyclobutane-1,3-diol by reacting 2,2,4,4-tetramethylcyclobutanedione with a secondary alcohol in the presence of a transfer hydrogenation catalyst.
Claims20
A process for the producing 2,2,4,4-tetramethylcyclobutane-1,3-diol comprising:
- (i) contacting 2,2,4,4-tetramethylcyclobutanedione with a secondary alcohol in the presence of a transfer hydrogenation catalyst to produce 3-hydroxy-2,2,4,4-tetramethylcyclobutanone and the corresponding ketone derived from the secondary alcohol;
- and
- (ii) contacting the 3-hydroxy-2,2,4,4-tetramethylcyclobutanone with a secondary alcohol in the presence of a transfer hydrogenation catalyst to produce 2,2,4,4-tetramethylcyclobutane-1,3-diol and the corresponding ketone derived from the secondary alcohol, wherein the ketone is optionally removed by reactive distillation.
Dependencies are inferred from the claim text.