Palladium-Catalyzed Asymmetric Allylic Alkylation of Cyclic Dienol Carbonates: Efficient Route to Enantioenriched γ-Butenolides Bearing an All-Carbon α-Quaternary Stereogenic Center
作者:Jeremy Fournier、Oscar Lozano、Candice Menozzi、Stellios Arseniyadis、Janine Cossy
DOI:10.1002/anie.201206368
日期:2013.1.21
Allyl dienol carbonates (1) served as substrates for the title reaction to afford the furanones 2 in both high yields and high enantioselectivities. These furanones were eventually converted into valuable building blocks including γ‐tertiary and γ‐quaternary furanones (3) as well as β‐quaternary butyrolactones (4). This method was used as a key step in the total synthesis of (−)‐nephrosteranic acid
α,β,γ:碳酸烯丙二烯酯(1)作为标题反应的底物,以高收率和高对映选择性同时提供呋喃酮2。这些呋喃酮最终被转化为有价值的结构单元,包括γ-叔和γ-季呋喃酮(3)以及β-季丁内酯(4)。该方法被用作(-)-肾甾酸和(-)-木纤维酸的全合成过程中的关键步骤。