In this paper, we described the preparation of fused (Het)Aryltetrahydroindolizinones via N-acyl iminium intermediates. Two different routes were also explored to achieve the synthesis. The first one consists in the intramolecular reaction of β-hydroxylactams whereas the second route one is an intermolecular condensation between a 2-formylester or a β-alkoxylactone and an appropriate primary amine
PIDA/TBAB-Promoted Oxidative Geminal Dibromofunctionalization of Alkynes: Direct Synthesis of Geminal Diazides
作者:Sagar Arepally、Venkata Nagarjuna Babu、Ashok Polu、Duddu S. Sharada
DOI:10.1002/ejoc.201801081
日期:2018.11.8
PIDA/TBAB-promoted oxidative geminal diazidofunctionalization of alkynes has been described for the first time. The transformation demonstrates a mechanistically distinctive approach to access geminal diazides, in which TBAB plays a crucial role as brominating agent and for the in situ generation of tetrabutylammonium azide. Furthermore, we have demonstrated here the first cycloaminative strategy by
An electrochemical tandem oxidative azidation and intramolecular cyclization strategy for the synthesis of quinoxaline derivatives
作者:Kai Zhou、Shendan Xia、Zhiwei Chen
DOI:10.1039/d3ob00558e
日期:——
An electrochemical-oxidation-induced intramolecular annulation for the synthesis of quinoxalines was developed under undivided electrolytic conditions. N-Aryl enamines and TMSN3 as the starting materials could smoothly participate in the transformation to achieve the construction of two C–N bonds through tandem azidation and cyclic amination reactions. The reaction could be easily handled and avoided