Pancratistatin cyclic phosphate prodrugs and phenpanstatin cyclic phosphate prodrugs
申请人:Arizona Board of Regents, a body corporate of the State of Arizona, acting for and on behalf of Arizona State University
公开号:US07351830B2
公开(公告)日:2008-04-01
Selective phosphorylation of phenpanstatin (3a) with tetrabutylammonium dihydrogen phosphate and dicyclohexyl-carbodiimide in pyridine followed by cation exchange chromatographic procedures was found to provide an efficient mute to a new series (3b-3d) of promising 3,4-O-cyclic phosphate prodrugs designated phenpanstatin phosphates. Application of analogous reaction conditions to pancratistatin (1a) led to a mixture of monophosphate derivatives where sodium paancratistatin 4-O-phosphate (4a) was isolated and the structure confirmed by x-ray craxtallography. Modification of the reaction conditions allowed direct phosphorylation of pancratistatin followed by cation exchange chromatography to afford sodium pancratistatin 3,4-O-cyclic phosphate (5b) which was selected for preclinical development.
通过在吡啶中使用四丁基氢氧化磷酸铵和二环己基碳二亚胺选择性磷酸化苯丙氨酮(3a),然后进行阳离子交换色谱程序,发现提供了一种有效的方法制备一系列有前途的3,4-O-环磷酸酯前药苯丙氨酮磷酸酯(3b-3d)。将类似的反应条件应用于鸟笼花碱(1a),导致单磷酸衍生物的混合物,其中分离出钠鸟笼花碱4-O-磷酸酯(4a),并通过X射线晶体学确认其结构。修改反应条件,直接磷酸化鸟笼花碱,然后进行阳离子交换色谱,得到钠鸟笼花碱3,4-O-环磷酸酯(5b),被选为临床前开发的药物。