Structure-Based Drug Design of Novel Potent and Selective Tetrahydropyrazolo[1,5-<i>a</i>]pyrazines as ATR Inhibitors
作者:Paul A Barsanti、Robert J. Aversa、Xianming Jin、Yue Pan、Yipin Lu、Robert Elling、Rama Jain、Mark Knapp、Jiong Lan、Xiaodong Lin、Patrick Rudewicz、Janet Sim、Lorena Taricani、George Thomas、Linda Xiao、Qin Yue
DOI:10.1021/ml500353p
日期:2015.1.8
A saturation strategy focused on improving the selectivity and physicochemical properties of ATR inhibitor HTS hit 1 led to a novel series of highly potent and selective tetrahydropyrazolo[1,5-a]pyrazines. Use of PI3K alpha mutants as ATR crystal structure surrogates was instrumental in providing cocrystal structures to guide the medicinal chemistry designs. Detailed DMPK studies involving cyanide and GSH as trapping agents during microsomal incubations, in addition to deuterium-labeled compounds as mechanistic probes uncovered the molecular basis for the observed CYP3A4 TDI in the series.
Ring Opening of Cyclic Sulfamidates with Magnesiated Heterocycles: Expedient Synthesis of Highly Functionalised Azaindolines and Azatetrahydroquinolines
Magnesiated chloropyrimidine and chloropyridine derivatives, obtained by deprotonation with TMPMgCl center dot LiCl at room temperature, undergo facile ring-opening reactions with five-and six-membered N-Boc and N-Bn cyclic sulfamidates. After an acidic workup, the adducts undergo rapid intramolecular cyclisation on basification to give highly functionalised stereodefined azaindolines and azatetrahydroquinolines in good yields.