Basf Se Corporation

Abhijeet Deb Roy

Vijay Narayanan Swaminathan

Stefan Rüdenauer

Shrirang Bhikaji Hindalekar

Thomas Fenlon

Dominik Ohlmann

Priti Kulkarni

Rahul Mulay

Nisha Pansare

A process for preparing D-glucaro-6,3-lactone from a salt of D-glucaric acid is provided. The process includes: adding a mineral acid to a pre-cooled solution including a salt of D-glucaric acid, water, and acetone to obtain a crude mixture; allowing the crude mixture to rise to a temperature in a range of &#x2265;15&#xb0; C. to &#x2264;35&#xb0; C. and stirring the crude mixture; filtrating the crude mixture and washing with an acetone and water solvent mixture to obtain a filtrate; concentrating the filtrate under vacuum pressure to obtain a concentrated filtrate having a water content in a range of &#x2265;20.0 wt. % to &#x2264;40.0 wt. %, relative to an overall weight of the concentrated filtrate; storing the concentrated filtrate at a temperature in a range of &#x2265;0&#xb0; C. to &#x2264;5&#xb0; C., and optionally repeating the concentrating and storing steps to obtain a precipitate comprising D-glucaro-6,3-lactone.

Process for preparing D-glucaro-6,3-lactone

The present invention relates to a process for preparing 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one, which comprises a) providing 6,10-dimethylundeca-1,5,9-trien-4-ol, b) oxidizing 6,10-dimethylundeca-1,5,9-trien-4-ol provided in step a) with an oxidizing agent in the presence of at least one organic nitroxyl radical, at least one nitrate compound and an inorganic solid to yield 6,10-dimethylundeca-1,5,9-trien-4-one, c) reacting the 6,10-dimethylundeca-1,5,9-trien-4-one obtained in step b) with an acid to yield 1-(2,6,6-trimethylcyclohex-2-en-1-yl)but-2-en-1-one.

Process for preparing &#x3b1;-damascone

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Thane, India

Abhijeet Deb Roy