Synthesis of Cyclic Pyranopterin Monophosphate, a Biosynthetic Intermediate in the Molybdenum Cofactor Pathway
作者:Keith Clinch、Derek K. Watt、Rachel A. Dixon、Sylvia M. Baars、Graeme J. Gainsford、Ashish Tiwari、Günter Schwarz、Yas Saotome、Michael Storek、Abdel A. Belaidi、Jose A. Santamaria-Araujo
DOI:10.1021/jm301855r
日期:2013.2.28
establishing all four stereocenters found in 1. Compound 10, characterized spectroscopically and by X-ray crystallography, was transformed through a selectively protected tri-tert-butoxycarbonylamino intermediate into a highly crystalline tetracyclic phosphate ester (15). The latter underwent a Swern oxidation and then deprotection to give 1·HBr. Synthesized 1·HBr had in vitro efficacy comparable to that
从细菌培养物中分离出的环状吡喃蝶呤单磷酸酯(1)先前已被证明可有效地恢复缺钼辅助因子(MoCo)的小鼠和人类患者中钼酶的正常功能。这里描述的是1氢溴酸盐(1 ·HBr)的合成,该反应在关键步骤中使用2,5,6-三氨基-3,4-二氢嘧啶-4-酮二盐酸盐与d-半乳糖苯基Vi之间的Viscontini反应得到吡喃蝶呤( 5a S,6 R,7 R,8 R,9a R)-2-氨基-6,7-二羟基-8-(羟甲基)-3 H,4 H,5 H,5aH,6 H,7 H,8 H,9a H,10 H-吡喃并[3,2 - g ] pteridin -4-one(10)并建立在1中发现的所有四个立体中心。通过光谱和X射线晶体学表征的化合物10通过选择性保护的三叔丁氧基羰基氨基中间体转变为高度结晶的四环磷酸酯(15)。后者进行Swern氧化,然后脱保护得到1 ·HBr。合成的1 ·HBr的体外功效与1的相当通过将其酶促转