Convergent synthesis of 2,3-bisarylpyrazolones through cyclization of bisacylated pyrazolidines and hydrazines
作者:Todd A. Brugel、Tomas Hudlicky、Michael P. Clark、Adam Golebiowski、Mark Sabat、Mary Ann A. Endoma、Vu Bui、David Adams、Matthew J. Laufersweiler、Jennifer A. Maier、Roger G. Bookland、Biswanath De
DOI:10.1016/j.tetlet.2006.03.063
日期:2006.5
Cyclization of various bisacylated hydrazines and pyrazolidines using DBU or sodium hydride leads to the formation of various mono-, bi- and tricyclic pyrazolone scaffolds in 41-98% yield. The convergent nature by which the precyclization intermediates are constructed allows for rapid derivatization about the pyrazolone core. (c) 2006 Elsevier Ltd. All rights reserved.