204852-67-5Relevant articles and documents
MANUFACTURE PROCESS OF ORGANIC COMPOUNDS
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Page/Page column 5, (2009/09/28)
The present invention relates to a method of preparing N-substituted salicylamides or derivatives thereof and their derivatives, e.g. their salts. In particular, the present invention relates to a method of preparing (N-(5-chlorosalicyloyl)-8-aminocapryli
Use of oligosalicylates in the preparation of phenolic amido acids
Gschneidner, David,Corvino, JoAnne,Freeman, John,O'Toole, Doris,Shields, Lynn,Wang, Eric
, p. 1567 - 1575 (2007/10/03)
A simplified methodology has been developed for preparing salicylamides from the corresponding acids via oligosalicylates which both protect the phenolic group and, at the same time, activate the carboxyl for coupling. Copyright Taylor & Francis, Inc.
Method of preparing salicylamides
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Page/Page column 8-9, (2008/06/13)
The present invention provides a fast, high yield method for preparing salicylamide intermediates. The method comprises reacting a C4 or higher alkyl ester of salicylic acid or derivative thereof with at least one amine selected from the group consisting of monoalkylamines, dialkylamines, ammonia, and any combination of any of the foregoing in alcohol to yield the sali-cylamide. The C4 or higher alkyl ester of salicylic acid or a derivative thereof is preferably prepared by reacting salicylic acid or a derivative thereof with a C4 or higher alcohol in presence of at least one of sulfuric acid, a sulfonic acid, and a mineral acid. This process for preparing salicylamide intermediates from salicylic acid or derivative thereof generally has a cycle time of about 2 days, and yields about 95% of a 99% pure material. In comparison, when a C3 or lower alkyl ester is used in lieu of the C4 or higher alkyl ester, the process generally has a cycle time of 7-9 days and yields about 60% of a 95% pure material. Methods of preparing an alkylated salicylamide are also provided.