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 Petasis reaction. 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
已经开发了一种新的用于合成官能化二氢吡喃酮的合成方法,该方法与Petasis反应中的胺,乙醛酸和4-取代的1,2,-氧杂硼-2(5H)-ols一起使用。机理研究表明分子间SN2环化可提供3,6-二氢-2H-吡喃-2-酮(3,6-DHP)和5,6-二氢-2H-吡喃-2-酮(5,6-DHP)一步即可获得中等至出色的产量。