Highly Diastereoselective Synthesis of Chiral Furans with a Quaternary Carbon Substituent at the 2-Position Using 8-Phenylmenthol as the Chiral Auxiliary
作者:Aki Katori、Yoshiaki Sashihara、Akihisa Iwamoto、Satoshi Kojima、Yohsuke Yamamoto
DOI:10.1246/cl.140052
日期:2014.6.5
The reaction of cis-4-oxo-2-pentenal and 8-phenylmenthyl 2-oxocyclopentane-1-carboxylate in the presence of a fluorinated cosolvent afforded the corresponding furan product with a high diastereoselectivity of up to 96% de. Other cyclic β-ketoesters reacted in a likewise diastereoselective manner.
顺式-4-氧代-2-戊烯醛和 2-氧代环戊烷-1-甲酸 8-苯薄荷酯在氟化助溶剂存在下反应,得到相应的呋喃产物,非对映选择性高达 96%de。其他环状 β 酮酯也以同样的非对映选择性方式发生反应。