Process for preparing erythromycin succinate
Patent 4219641 Issued on August 26, 1980. Estimated Expiration Date: 
June 14, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
June 14, 1999. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2857312 2967129 3853842 InventorsAssigneeApplicationNo. 06/048510 filed on 06/14/1979US Classes:536/7.2Erythromycin or derivative (e.g., oleandomycin, etc.)ExaminersPrimary: Brown, Johnnie R.Assistant: Hazel, Blondel Attorney, Agent or FirmInternational ClassesC07H 17/00 (20060101)C07H 17/08 (20060101) AbstractA rapid and efficient process for preparing the useful antibiotic erythromycin ethyl succinate in high yield which comprises reacting erythromycin USP quality free base with ethyl succinyl chloride in a two phase system consisting of an organic solvent which is capable of forming two phases with water or an aqueous base, and an aqueous base. |
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