Acylmercaptoalkanoylamino lactam esters or acids are converted to the corresponding mercaptoalkanoylamino lactam ester or acid under basic conditions by including an agent which minimizes the amount of disulfides. Suitable agents are bismercaptans, phosphine or phosphite reducing agents, zinc metal powder, and sodium hydrosulfite. Such agents are also employed in the recrystallization and reprocessing of the mercaptoalkanoylamino lactam acids.
                            Acylmercaptoalkanoylamino内酰胺酯或酸在碱性条件下转化为相应的mercaptoalkanoylamino内酰胺酯或酸,其中包括最小化二
硫化物量的剂量。合适的剂量包括双
硫醇、膦或
亚磷酸还原剂、
锌金属粉和亚
硫酸氢钠。这些剂量也被用于mercaptoalkanoylamino内酰胺酸的重结晶和再加工中。