Chemo- and regioselective reductive transposition of allylic alcohol derivatives <i>via</i> iridium or rhodium catalysis
作者:Rylan J. Lundgren、Bryce N. Thomas
DOI:10.1039/c5cc07993d
日期:——
The selective, catalytic deoxygenation of alcohols remains a persistent challenge in organic synthesis. Pd-catalyzed formate reduction and diazene-mediated reductivetransposition are both valuable strategies for the selective deoxygenation of allylic...
Sequential Two‐Fold<i>Claisen</i>Rearrangement, One‐Pot Ring‐Closing Metathesis and Cross‐Metathesis as a Route to Substituted Benzo[<i>b</i>]azepine‐2‐one, Benzo[<i>b</i>]azepine and Benzo[<i>b</i>]oxepine Derivatives
作者:Shyamasankar Mandal、Jeet Banerjee、Sougata Maity、Shital K. Chattopadhyay
DOI:10.1002/hlca.202000216
日期:2021.3
A synthetic protocol involving sequential use of three atom‐economic processes viz. Claisen rearrangement, ring‐closing metathesis and crossmetathesis has been developed to access 7‐substituted benzo[b]azepine and benzo[b]oxepine derivatives starting from appropriate aniline or phenol in good overall yield. A one‐pot RCM‐CM protocol has also been developed for the synthesis of benzazepine and benzoxepine
涉及依次使用三个原子经济过程的合成协议,即。已经开发出克莱森重排,闭环复分解和交叉复分解以适当的苯胺或苯酚为原料,以良好的总收率获得7-取代的苯并[ b ]氮杂和苯并[ b ]氧杂环丁烷的衍生物。还开发了一种单罐RCM-CM协议,用于合成苯并ze庚因和苯并氧平衍生物。
A New Synthesis of Substituted 2,5-Dihydrobenzo[b]oxepines
Based on Claisen rearrangement, Baeyer-Villiger oxidation, and ring-closing metathesis (RCM), a series of substituted 2,5-dihydrobenzo[b]oxepines were synthesized from isovanillin in good over-all yields. Other appropriate substituted 2,5-dihydrobenzo[b]oxepines prepared from corresponding phenol derivatives were also described.
Sen; Sen Gupta, Journal of the Indian Chemical Society, 1953, vol. 30, p. 433