Pyrazin-2-ylpyrazoles are described, as is the use thereof as insecticides and/or parasiticides.
Additionally described are processes for preparation thereof, and compositions which comprise such pyrazin-2-ylpyrazoles.
Divergent Synthesis of 6- or 7-Aza-Indazoles via Intramolecular Diels–Alder Cascade of Pyrazines
作者:Nicolas Brach、Lucas Popek、Mathieu Truong、Claire Laurent、Vincent Bizet、Krishna P. Kaliappan、Nicolas Blanchard
DOI:10.1021/acs.orglett.3c03052
日期:2023.11.3
Pyrazines are reactive 4π partners in intermolecular Diels–Alder cycloaddition with exceptionally activated dienophiles or in an intermolecular version at elevated temperatures. Herein, it is shown that an intramolecular cascade could occur even at room temperature, delivering a collection of 6- or 7-aza-indazoles. An interesting substituent effect of the cycloaddition precursor on the product distribution