作者:Akihiko Kojima、Yasushi Kohno
DOI:10.1016/j.tet.2012.11.072
日期:2013.2
We found a mild and efficient reaction condition for construction of a chiral 5-methyl-4,5-dihydropyridazin-3(2H)-one from a chiral beta-methyl gamma-ketocarboxylic acid via the corresponding acid hydrazide without racemization. Furthermore, we demonstrated that this two-step reaction can be attained by one-pot reaction. This method could be applied to various kinds of substrates because of the mild reaction conditions. (C) 2012 Elsevier Ltd. All rights reserved.