Scheme 1.
Synthesis of pyrazolo[3,4-g]isoquinolines (1a–1c, 2a–2c) and methanesulfonate salt 1a’. Reagents and conditions: (a) H2N-NH2.H2O or methyl/ethylhydrazinium salts, EtOH (b) H2, Pd/C, CH2Cl2/MeOH (c) MeSO3H, Et2O.
Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.