File Entry: Novel polymorph of 5-cyanopthalide high purity intermediate for thepreparation of citalopram and escitalopram

Created: 2012-07-24 12:02:16
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Version created on: 2012-07-24 12:02:16


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The present invention relates to obtaining a new polymorph of 5-Cyanophthalide in highly pure form (99.5 to 99.99%), which is an intermediate used forthe synthesis of citalopram& escitalopram both of which are potent antidepressant drugs.Moreover this new polymorph of 5-cyanophthalide does not contain impurities liketerephthalic acid & diphthalide derivatives.

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