Tetrahedron letters

Facile catalyzed acylation of alcohols, phenols, amines and thiols based on ZrOCl 2· 8H 2 O and acetyl chloride in solution and in solvent-free conditions

R Ghosh, S Maiti, A Chakraborty

文献索引：Ghosh, Rina; Maiti, Swarupananda; Chakraborty, Arijit Tetrahedron Letters, 2005 , vol. 46, # 1 p. 147 - 151

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被引用次数: 113

摘要

Acetylation of hydroxy groups is an often used protection technique because of the ease of formation as well as mild conditions for deprotection. 1 Such acylations can be effected with acetic anhydride or acetyl chloride in the presence of bases like pyridine, 1 Et 3 N, 1 DMAP, 2 Bu 3 P, 3 etc. Acylations with acids, 4 acyl imidazoles 5 and acyl urea 6 are also known. Acid catalyzed acylations mainly use Brønsted acids 7 including polymeric acids 8 or Lewis acids. Metal chlorides, 9 metal ...