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US 9,000,224 B1Granted
Process for the preparation of pillar[5]quinone
AssigneeCouncil of Scientific and Industrial Research
InventorsJessy Sanjayan Gangadhar, Ishwara Shivakumar Kilingaru
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Abstract
The present invention relates to a process for the preparation of pillar[5]quinone and further relates to an easy-to-operate and chromatography-free process for the preparation of crystalline pillar[5]quinone by the oxone/iodobenzene-mediated oxidative de-aromatization of readily available 1,4-dimethoxypillar[5]arenes in good yields.
Claims5
A process for the preparation of crystalline form of pillar[5]quinone, wherein said process comprises the following steps:
- (a) mixing 1,4-dimethoxypillar[5]arene, acetonitrile, and an oxidizing agent in water to obtain a reaction mixture;
- (b) adding iodobenzene to the reaction mixture of step (a) in a mole ratio of 1:2 to obtain a solution;
- and
- (c) stirring the solution of step (b) for a time duration in the range of 45-48 hrs at a temperature in the range of 25-35° C. followed by purification with a solvent to obtain a crystalline form of pillar[5]quinone.
1 more element
Dependencies are inferred from the claim text.