Efficient and regioselective synthesis of 2-alkyl-2H-indazoles.
An efficient and regioselective synthesis of 2-methyl-2H-indazoles and 2-ethyl-2H-indazoles using trimethyloxonium tetrafluoroborate or triethyloxonium hexafluorophosphate is reported.
Cheung
Mui
M
GlaxoSmithKline, Five Moore Drive, Research Triangle Park, North Carolina 27709, USA. mc72785@gsk.com
Boloor
Amogh
A
Stafford
Jeffrey A
JA