Synthesis of 2,4,5-Trisubstituted 3-Fluorofurans via Sequential Iodocyclization and Cross-Coupling of gem-Difluorohomopropargyl Alcohols
摘要:
The iodocyclization of gem-difluorohomoallenyl and gem-difluorohomopropargyl alcohols with I-2 and ICI, respectively, produced the corresponding,fluorinated iodofuran analogues in good yields. The iodo substituent in fluorinated 4-iodofurans was utilized as a synthetic handle to prepare multisubstituted 3-fluorofurans using a Suzuki cross-coupling reaction. The yields of both iodocyclization of gem-difluorohomopropargyl alcohol and subsequent Suzuki coupling were dramatically enhanced by microwave irradiation.
Synthesis of 2,4,5-Trisubstituted 3-Fluorofurans via Sequential Iodocyclization and Cross-Coupling of <i>gem</i>-Difluorohomopropargyl Alcohols
作者:Satoru Arimitsu、Jesse M. Jacobsen、Gerald B. Hammond
DOI:10.1021/jo800088y
日期:2008.4.1
The iodocyclization of gem-difluorohomoallenyl and gem-difluorohomopropargyl alcohols with I-2 and ICI, respectively, produced the corresponding,fluorinated iodofuran analogues in good yields. The iodo substituent in fluorinated 4-iodofurans was utilized as a synthetic handle to prepare multisubstituted 3-fluorofurans using a Suzuki cross-coupling reaction. The yields of both iodocyclization of gem-difluorohomopropargyl alcohol and subsequent Suzuki coupling were dramatically enhanced by microwave irradiation.