Efficient and Convenient Method for Synthesis of Benzofuran-3-acetic Acids and Naphthafuran-acetic Acids
作者:Mahantesha Basanagouda、Narayanachar、Iranna B. Majati、Shiddappa S. Mulimani、Satish B. Sunnal、Rohit V. Nadiger、Ashok S. Ghanti、Siddeshwar F. Gudageri、Ravi Naik、Akshata Nayak
DOI:10.1080/00397911.2015.1068943
日期:2015.10.2
Herein, we report an efficient and convenient method for synthesis of benzofuran-3-acetic acids and naphthafuran-acetic acids 5a-p by the reaction of substituted-4-bromomethylcoumarins with aqueous sodium hydroxide at refluxing temperature. The obtained products are characterized by infrared, H-1 NMR, C-13 NMR, and mass spectral data. Structures 5a and 5e are confirmed by their single x-ray diffraction studies. The advantages of this method are good yields, easy workup, and no chromatographic purifications.