A novel method for the mild and selective amidation of diesters and the amidation of monoesters
โ Scribed by Zhenrong Guo; Eric D Dowdy; Wen-Sen Li; Richard Polniaszek; Edward Delaney
- Publisher
- Elsevier Science
- Year
- 2001
- Tongue
- French
- Weight
- 94 KB
- Volume
- 42
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
The selective monoamidation of diesters and amidation of esters mediated by Lewis acids are described. The selective amidations of dimethyl pyridine-2,5-dicarboxylate (1) and dimethyl 2,3-indole-dicarboxylate (4) with primary and secondary amines mediated by MgCl 2 or MgBr 2 under mild conditions gave the corresponding ester-amides in high yield.
๐ SIMILAR VOLUMES
Samarium-mediated facile method for the formation of amide bonds by the reaction of acyl chlorides and amines is described. The reaction afforded high yields of the desired amides under mild and neutral conditions.
N-tosyl amides and lactams can be prepared easily and under mild conditions by the inter-or intramolecular condensation of carboxylic acids and secondary sulfonamides. The coupling reagent used is dicyclohaxylcarbodiimide (DCC) in the presence of 4-pyrrolidioopyridine (4-PPY) and the reactions proce