Selective and Stepwise Functionalization of the Pyridazine Scaffold by Using Thio‐Substituted Pyridazine Building Blocks
作者:Clémence Hamze、Julie Brossier、Konstantin Karaghiosoff、Edouard Godineau、Paul Knochel
DOI:10.1002/chem.202302156
日期:2023.11.13
of the pyridazine scaffold using two readily available building blocks: 3-(butylthio)-6-chloropyridazine and 3,4-bis(methylthio)-6-chloropyridazine by performing selective metalations with TMPMgCl ⋅ LiCl and catalyst-tuned cross-coupling reactions with arylzinc halides. Several of the resulting pyridazines were converted into more elaborated N-heterocycles such as thieno[2,3-c]pyridazines and 1H-pyrazolo[3
我们描述了哒嗪支架的区域选择性三功能化和四功能化,使用两种现成的构建模块:3-(丁硫基)-6-氯哒嗪和3,4-双(甲硫基)-6-氯哒嗪,通过使用TMMPgCl进行选择性金属化。 LiCl 和催化剂调节的与芳基卤化锌的交叉偶联反应。所得的几种哒嗪被转化为更精细的N-杂环,例如噻吩并[2,3- c ]哒嗪和1H-吡唑并[3,4- c ]哒嗪。