Synthesis of 6-Substituted 2-Pyrones Starting from Renewable Resources: Total Synthesis of Sibirinone, (<i>E</i>)-6-(Pent-1-en-1-yl)-2<i>H</i>-pyran-2-one, and (<i>E</i>)-6-(Hept-1-en-1-yl)-2<i>H</i>-pyran-2-one
作者:Daniel Dobler、Oliver Reiser
DOI:10.1021/acs.joc.6b01339
日期:2016.11.4
An atom-economic reaction sequence to 6-substituted 2-pyrones was developed starting from furfuryl alcohol, a renewable resource made from bran or bagasse, and aldehydes, utilizing a thermal rearrangement of cyclopentadienone epoxides as key step. Derivatives bearing a hydroxyalkyl side chain could be enzymatically resolved, providing access to enantiomerically pure 2-pyrones, or converted to alkenyl-substituted
利用环戊二烯酮环氧化物的热重排,从糠醇(一种由麸皮或甘蔗渣制得的可再生资源)和醛开始,开发了一种针对6位取代的2-吡喃酮的原子经济反应序列。带有羟烷基侧链的衍生物可以通过酶法拆分,从而获得对映体纯的2-吡喃酮,或转化为烯基取代的2-吡喃酮,例如天然存在的西比利农酮,(E)-6-(pent-1-en-1- yl)-2 H-吡喃-2-酮和(E)-6-(庚-1-烯-1-基)-2 H-吡喃-2-酮。