Diastereoselective synthesis of 5-iminooxazolines and their subsequent transformation to α,α-disubstituted dipeptide esters: a formal [4+1] cycloaddition reaction of cyclohexyl isocyanide and Z-alkyl-α-benzoyl amino-acrylates
作者:Abbas Ali Esmaeili、Shima Shahmansouri、Azizollah Habibi、Ali Reza Fakhari
DOI:10.1016/j.tet.2012.06.073
日期:2012.9
A novel atom economical diastereoselective synthesis of 5-iminooxazolines and their subsequent transformation to α,α-disubstituted dipeptide esters is described. Heating a mixture of cyclohexyl isocyanide and Z-α-benzoyl amino-acrylic acid alkyl esters under solvent-free conditions, afforded 5-iminooxazolines, which, upon specifications provided α,α-disubstituted dipeptide esters in good yield.
描述了5-亚氨基恶唑啉的新颖的原子经济的非对映选择性合成及其随后转化为α,α-二取代的二肽酯。在无溶剂条件下加热环己基异氰化物和Z -α-苯甲酰基氨基丙烯酸烷基酯的混合物,得到5-亚氨基恶唑啉,根据规格,该α-α-二取代的二肽酯产率高。