Strategy for the Synthesis of Pyridazine Heterocycles and Their Derivatives
作者:Hassen Bel Abed、Oscar Mammoliti、Omprakash Bande、Guy Van Lommen、Piet Herdewijn
DOI:10.1021/jo400989q
日期:2013.8.16
The first synthesis of novel fused pyridazines has been realized starting from 1,3-diketones involving a Diaza–Wittig reaction as a key step. A convenient strategy was elaborated to access versatile pyridazinederivatives allowing the variation of substituents at position 6 of the heterocyclic ring. In a first part, pyridazines bearing an ester group were synthesized as a model to evaluate the methodology
Construction of Two Vicinal Quaternary Carbons by Asymmetric Allylic Alkylation: Total Synthesis of Hyperolactone C and (−)-Biyouyanagin A
作者:Chao Du、Liqi Li、Ying Li、Zhixiang Xie
DOI:10.1002/anie.200902908
日期:2009.10.5
Call on triple A: Palladium‐catalyzed asymmetric allylic alkylation (Pd‐AAA; see scheme) has enabled a concise and efficient synthesis of hyperolactoneC and (−)‐biyouyanagin A in only six (20 % overall yield) and seven (8 % overall yield) steps, respectively. The enantiomers of these natural products were also prepared by exploiting the same methodology.
A short and convenient strategy for the synthesis of pyridazines via Diaza–Wittig reaction
作者:Hassen Bel Abed、Oscar Mammoliti、Guy Van Lommen、Piet Herdewijn
DOI:10.1016/j.tetlet.2012.09.059
日期:2012.11
A convenient and selective synthesis of 6-substituted-4-hydroxy-3-methoxycarbonyl pyridazines has been developed via a diaza-Wittig reaction. The desired products substituted at the C6 position can be obtained from readily available starting materials under mild conditions. This represents an attractive new method for the synthesis of pyridazine derivatives. (C) 2012 Elsevier Ltd. All rights reserved.
Organophosphorus-catalyzed diaza-Wittig reaction: application to the synthesis of pyridazines
作者:Hassen Bel Abed、Oscar Mammoliti、Omprakash Bande、Guy Van Lommen、Piet Herdewijn
DOI:10.1039/c4ob01201a
日期:——
The elaboration of the first organophosphorus-catalyzed diaza-Wittig reaction is reported.