A novel and convenient strategy for the synthesis of phthalazines from an aryne precursor
作者:Hassen Bel Abed、Omprakash Bande、Oscar Mammoliti、Guy Van Lommen、Piet Herdewijn
DOI:10.1016/j.tetlet.2013.10.075
日期:2013.12
A novel three-step entry toward phthalazine derivatives has been elaborated. A strategy based on a sequential acyl-alkylation/diazo transfer reaction/Diaza-Wittig reaction led to the desired analogues in moderate to good yields from an aryne precursor. Various aryl groups were introduced on the annulated pyridazine, moreover the presence of an ester group allows further modifications.
2,3-Benzodiazepines were synthesized by two-step or one-pot reactions from aryne precursors. Reaction of 2-(trimethylsilyl)aryl triflates with β-diketones in the presence of CsF gave ortho-substitu...