Catalytic, Enantioselective Vinylogous Mukaiyama Aldol Reaction of Furan-Based Dienoxy Silanes: A Chemodivergent Approach to γ-Valerolactone Flavan-3-ol Metabolites and δ-Lactone Analogues
作者:Claudio Curti、Nicoletta Brindani、Lucia Battistini、Andrea Sartori、Giorgio Pelosi、Pedro Mena、Furio Brighenti、Franca Zanardi、Daniele Del Rio
DOI:10.1002/adsc.201500705
日期:2015.12.14
a set of hydroxyphenyl γ-valerolactones was achieved starting from 2-silyloxyfuran and alkoxy-substituted benzaldehydes as common precursors. Key synthesis steps included an enantioselective vinylogous Mukaiyamaaldolreaction and a Barton–McCombie deoxygenation. Five enantioenriched γ-valerolactone targets were obtained in 5–6 steps, 18–63% overall yields and 82–98 % ee, paving the way for the straightforward