作者:Douglas C. Beshore、Robert M. DiPardo、Scott D. Kuduk
DOI:10.1016/j.tetlet.2009.12.054
日期:2010.2
The preparation of pyrazolo[4,3-c]quinolinones is reported starting from 2-substituted-5-(2-fluorophenyl)-3-oxo-2,4-dihydro-3H-pyrazol-3-ones. A one-pot protocol was developed, in which condensation with an orthoamide, followed by substitution with a primary amine and subsequent S(N)Ar-cyclization, to provide rapid access to 4- and 5-substituted pyrazolo[4,3-c]quinolinones. (C) 2009 Elsevier Ltd. All rights reserved.