One-pot synthesis of 2,4,5-trisubstituted oxazoles from N-acyl amino acids by a combination of cyclodehydration with N,N′-diisopropylcarbodiimide and Wittig olefination
作者:Wenhua Huang、Guangping Dong、Zumureti Mijiti
DOI:10.1016/j.tet.2011.12.004
日期:2012.1
By a combination of cyclodehydration of N-acyl amino acids with N,N′-diisopropylcarbodiimide (DIC) and non-classical Wittig olefination of the resultant 5(4H)-oxazolones with Ph3PCHCN and Ph3PCHCOOEt, 5-oxazoleacetonitriles and 5-oxazoleacetates were synthesized in one-pot in 41–85% and 57–70% yields, respectively.
通过环化脱水的的组合ñ -酰基氨基酸与Ñ,Ñ '-diisopropylcarbodiimide(DIC)和所得到的5(4的非经典Wittig烯ħ)-oxazolones的Ph 3 P CHCN且Ph 3 P CHCOOEt,5-一锅合成恶唑乙腈和5-恶唑乙酸盐,产率分别为41-85%和57-70%。