Herein is disclosed a selective and facile approach for the construction of CF2H-containing pyrazolo[1,5-c]quinazolines from easily accessible 3-ylideneoxindoles and in situ generated CF2HCHN2. The reaction involving a [3 + 2] cycloaddition/1,3-H shift/rearrangement/dehydrogenation cascade proceeded smoothly at room temperature in the absence of catalyst and additive. Moreover, this metal-free process
本文公开了一种选择性且容易的方法,用于从容易获得的3-亚硝基氧
吲哚和原位生成的CF 2 HCHN 2构造含CF 2 H的
吡唑并[1,5- c ]
喹唑啉。涉及[3 + 2]环加成/ 1,3-H转变/重排/脱氢级联反应的反应在室温下在没有催化剂和添加剂的情况下顺利进行。此外,这种无
金属的工艺以及温和的条件对于制药业而言是理想且有价值的。重要的是,该反应具有广泛的底物范围,良好的官能团耐受性和克级合成能力。