作者:Daniel C. Schmitt、Nootaree Niljianskul、Neal W. Sach、John I. Trujillo
DOI:10.1021/acscombsci.8b00032
日期:2018.5.14
A modular, two-pot assembly of 7-arylpyrazolo[1,5-a]pyrimidones from aryl/heteroaryl halides and aminopyrazoles in library format was developed. Sonogashira coupling of aryl bromides with triethyl orthopropiolate, followed by in situ orthoester hydrolysis, provides access to beta-aryl ynoates, which undergo regioselective cyclocondensation with aminopyrazoles. The ability to vary the C7 vector of 7-arylpyrazolo[1,5-cdpyrimidones in two steps using readily available (hetero)aryl halides significantly enhances synthetic access to this challenging vector.