摘要:
Several phosphoserine and phosphothreonine synthons suitable for the stepwise synthesis of phosphopeptides have been prepared. Treatment of methylthiomethyl (MTM) esters of either benzyloxycarbonyl (Z), tert-butyloxycarbonyl (Boc) and allyloxycarbonyl (Alloc) serine and / or threonine with phosphochloridate in pyridine, followed by MgBr2 cleavage of MTM in diethylether, afforded the title compounds in excellent yields.