Base catalysed rearrangement of N-alkyl-O-acyl hydroxamic acids: synthesis of 2-acyloxyamides
作者:Andrew J. Clark、Yassair S. S. Al-Faiyz、Michael J. Broadhurst、Divya Patel、Joanne L. Peacock
DOI:10.1039/a909903d
日期:——
Activated N-alkyl-O-acyl hydroxamic acid derivatives 21a–t undergo thermal and basecatalysedrearrangement to give 2-acyloxyamides 22a–t in good to excellent yields (50–100%). A range of inorganic and organic bases were screened for their efficiency in mediating the rearrangement 21 to 22, however, simple organic bases such as Et3N were found to be the most efficient. Both aromatic and aliphatic derived