A New Synthetic Method of (<i>Z</i>)-4-Aryl-but-2-en-1-ols via Suzuki-Miyaura Cross-Coupling Reaction of 4-Substituted 1,2-Oxaborol-2(5<i>H</i>)-ols with Benzyl Bromides
作者:Tao Yu、Xinyan Wu、Jun Yang
DOI:10.1002/cjoc.201201122
日期:2012.12
Z and E configuration 4‐aryl‐but‐2‐en‐1‐ols were isolated from several terrestrial plants, and (Z)‐4‐aryl‐but‐2en‐1‐ols were found to have choleretic activity. Strategies have been reported to synthesize (E)‐4‐aryl‐but‐2‐en‐1ols with high selectivity. However, there is no method to obtain (Z)‐4‐aryl‐but‐2‐en‐1‐ols with high selectivity now. We developed a Suzuki‐Miyaura cross‐coupling reaction of 1
Regioselective Synthesis of Functionalized Dihydropyrones via the Petasis Reaction
作者:Hui Li、Chun-xiao Cui、Guang-hua Zhang、Xiao-qiang Li、Jun Yang
DOI:10.1021/acs.joc.9b02651
日期:2020.1.17
A novel synthesis methodology for the construction of functionalized dihydropyrones has been developed with amines, glyoxylic acid, and 4-substituted-1,2-oxaborol-2(5H)-ols from the Petasisreaction. Mechanistic investigation indicated the intermolecular SN2 cyclization to provide 3,6-dihydro-2H-pyran-2-ones (3,6-DHP) and 5,6-dihydro-2H-pyran-2-ones (5,6-DHP) in one step with moderate to excellent