作者:Richard T. Buck、Paul A. Clarke、Diane M. Coe、Martin J. Drysdale、Leigh Ferris、David Haigh、Christopher J. Moody、Neil D. Pearson、Elizabeth Swann
DOI:10.1002/1521-3765(20000616)6:12<2160::aid-chem2160>3.0.co;2-y
日期:2000.6.16
triethyl diazophosphonoacetate catalysed by rhodium(II) acetate in the presence of N-protected amino acid amides 8 gives the phosphonates 9. Subsequent Wadsworth-Emmons reaction of 9 with aldehydes in the presence of DBU gives dehydro dipeptides 10. The reaction has been extended to a simple two-step procedure, without the isolation of the intermediate phosphonate, for conversion of a range of amino acid
基于通过类胡萝卜素NH插入形成NHCHR1CONH-CHR2CO键,而不是形成肽键本身,描述了另一种合成二肽的方法。因此,在N-保护的氨基酸酰胺8的存在下,由乙酸铑(II)催化的重氮三膦酰基乙酸三乙酯的分解得到膦酸酯9。随后在DBU的存在下9与醛的Wadsworth-Emmons反应得到了脱氢二肽10。已扩展为简单的两步程序,无需分离中间体膦酸酯,即可将一系列氨基酸酰胺11转化为脱氢二肽12和N-甲基酰胺11 h,并将二肽转化为三肽( 13-> 14)。通过使用重氮苯基乙酸甲酯直接转化,