Microwave-assisted Claisen rearrangement of naphthyl 2-propynyl ethers: synthesis of naphthofurans
作者:V.S. Prasada Rao Lingam、Dnyaneshwar H. Dahale、Kagga Mukkanti、Balasubramanian Gopalan、Abraham Thomas
DOI:10.1016/j.tetlet.2012.08.053
日期:2012.10
An efficient two-step approach for the synthesis of naphtho[1,2-b]furans and naphtho[2,1-b]furans has been developed. Various functionalized propargyl alcohols were etherified with alpha- or beta-naphthol under Mitsunobu reaction conditions to give naphthyl 2-propynyl ethers, which underwent a facile microwave-assisted Claisen rearrangement and concomitant anionic cyclization to yield naphthofuran derivatives under basic reaction conditions. (c) 2012 Elsevier Ltd. All rights reserved.
Organoselenium Catalyzed Electrochemical Cascade Cyclization: An Access to Naphthofuran‐2‐carboxaldehyde
作者:Neha Dagar、Swati Singh、Sudipta Raha Roy
DOI:10.1002/adsc.202400189
日期:2024.6.10
We have developed an approach for the construction of naphthofuran‐2‐carboxaldehyde derivatives utilizing the synergy of electrochemical oxidation and organo‐selenium catalysis at room temperature. The compatibility of various functional groups and scalability of this protocol demonstrate the practicality of the electrochemical strategy. The synthetic utility of this strategy is furthermore demonstrated by synthesizing diversified molecules through downstream transformations.