作者:Christopher Mcguigan、Padma Narashiman
DOI:10.1055/s-1993-25855
日期:——
Dichlorophosphoramide is readily prepared by the reaction of bis(ß-chloroethyl)amine hydrochloride with phosphoryl chloride at elevated temperature. The crude product is pure without need for troublesome vacuum distillation. However, this reagent reacts only poorly with ethanol, propanol, and the methyl ester of valine. Thus, an alternative route was sought to amino acid linked derivatives of nitrogen mustards. This involved the synthesis of the appropriate alkyl phosphorodichloridate, and its reaction with bis(ß-chloroethyl)amine, followed by condensation with an amino acid carboxyl ester. Reactions proceed in high yield, under mild conditions. In all but the case of glycine derivatives, the presence of multiple chiral centres in the final product leads to the generation of diastereoisomers, which can be observed by spectroscopic and analytical (HPLC) methods.
二氯磷酰胺可以通过在高温下将双(β-氯乙基)胺盐酸盐与磷酰氯反应来容易地制备。粗产物纯净,无需繁琐的真空蒸馏。然而,这种试剂与乙醇、丙醇以及缬氨酸甲酯反应效果不佳。因此,人们寻求了另一种途径来制备与氮芥相连的氨基酸衍生物。这包括合成适当的烷基磷酸二氯酯,并将其与双(β-氯乙基)胺反应,随后与氨基酸羧酸酯缩合。反应在温和条件下进行,产率高。除了甘氨酸衍生物外,最终产品中存在多个手性中心导致生成非对映异构体,这些可以通过光谱学和分析学(HPLC)方法观察到。