Synthesis of 1-hetaryl-2,2-difluorocyclopropane-derived building blocks: The case of pyrazoles
作者:Pavel S. Nosik、Sergey V. Ryabukhin、Mykola O. Pashko、Galyna P. Grabchuk、Oleksandr O. Grygorenko、Dmitriy M. Volochnyuk
DOI:10.1016/j.jfluchem.2018.11.006
日期:2019.1
An approach to 1-hetaryl-2,2-difluorocyclopropane building blocks compatible with the current criteria of lead-oriented synthesis was developed and implemented for the case of 3-, 4- and 5-subsituted pyrazole derivatives. The method implied 6–9 synthetic steps, including difluorocyclopropanation with the TMSCF3–NaI system as the key transformation, and provided the title compounds on up to gram scale
针对3-,4-和5-取代的吡唑衍生物的情况,开发并实施了一种与目前的铅导向合成标准兼容的1-杂芳基-2,2-二氟环丙烷构件。该方法隐含6–9个合成步骤,包括以TMSCF 3 –NaI系统为主要转化的二氟环丙烷化,并提供了以克为单位的标题化合物。吡唑环和典型官能团(即COOH,NH 2,CH 2 NH 2,CH 2OH)成立。获得的结果使得可以为各种官能化的1-杂芳基-2,2-二氟环丙烷的合成可行性制定初步的指导方针。 2018 Elsevier Ltd.保留所有权利。