Synthesis of 3-hydroxycyclophosphamide and studies related to its possible role in the metabolism of cyclophosphamide
摘要:
Hydrogenolysis of 3-(benzyloxy)cyclophosphamide (10) using Pd/C catalyst and ethyl acetate as solvent leads to the formation of 3-hydroxycyclophosphamide (3, approximately 20%) and cyclophosphamide (1, approximately 10%), accompanied by regioselective hydrogen-exchange reactions at the C-4 and C-5 positions in 3 and 1. A variety of oxidizing reagents and liver microsomal incubation failed to provide evidence (31P NMR) for conversion of 1 into 3, whereas identical incubation of 3 led to its reduction to 1. Compound 3 is stable at pH 6.5-8.2, 37 degrees C, and exhibits anticancer activity comparable to 1 when tested against L1210 leukemia in mice. Data are discussed with regard to a previously reported suggestion that metabolism of 1 may involved oxidation to give 3 followed by rearrangement of 3 to 2.
4-Peroxycyclophosphamide is provided along with its method of preparation. The compound is useful for treating human cancer, particularly human primary and metastatic malignant brain tumors.
4-过氧化环磷酰胺及其制备方法。该化合物可用于治疗人类癌症,特别是人类原发性和转移性恶性脑肿瘤。
O-Methylhydroxylamine as a New Trapping Reagent for Quantitative Studies of 4-Hydroxycyclophosphamide and Aldophosphamide
作者:Gerald Zon、Susan Marie Ludeman、Edward M. Sweet、William Egan、Lawrence R. Phillips
DOI:10.1002/jps.2600710417
日期:1982.4
aldophosphamide) are quantitatively converted by O-methylhydroxylamine, at pH 7.4 and 37 degrees, into the E and Z isomers of aldophosphamide O-methyl oxime. These trapping products are readily extracted from aqueous media with either chloroform or ethyl acetate, are stable at pH 6-8 toward oxime hydrolysis and elimination of phosphoramide mustard (a secondary metabolite of cyclophosphamide), and showed