Synthesis and reactions of α-thioformyl dipeptides, possible biogenetic precursors of penicillin
作者:John Cheney、Clive J. Moores、James A. Raleigh、A. Ian Scott、Douglas W. Young
DOI:10.1039/p19740000986
日期:——
Thioformyl dipeptides (II) have been synthesised by various routes and the existence of these unstable compounds has been verified by trapping experiments. At room temperature the thioaldehydes polymerise readily and at lower temperatures the thioenol forms are stabilised. When thioenolisation is prevented by the presence of an α-methyl substituent as in (XX), polymerisation is the only observable
硫代甲酰基二肽(II)已经通过各种途径合成,并且这些不稳定的化合物的存在已经通过捕获实验得到证实。在室温下,硫醛容易聚合,而在较低温度下,硫烯醇形式稳定。如(XX)中所述,当通过α-甲基取代基的存在阻止硫烯醇化时,聚合是唯一可观察到的反应。尚未观察到以制备规模环化为β-内酰胺衍生物。