Diastereoselective synthesis of 1-(tetrahydrofuran-3-yl)-1,3-dihydroisobenzofuran derivatives via Prins bicyclization
作者:B.V. Subba Reddy、Sayed Jalal、Prashant Borkar、J.S. Yadav、P. Gurava Reddy、A.V.S. Sarma
DOI:10.1016/j.tetlet.2013.01.006
日期:2013.3
The homoallylic alcohol tethered with a benzylic hydroxyl group, that is, (E)-4-(2-(hydroxymethyl)phenyl)but-3-en-1-ol undergoes smooth Prins bicyclization with various aldehydes in the presence of 20 mol % Sc(OTf)3 and 4 Å MS at 80 °C to afford a novel series of 1-(tetrahydrofuran-3-yl)-1,3-dihydroisobenzofuran derivatives in good yields with high diastereoselectivity.
在20 mol%的存在下,与苄基羟基束缚的均烯丙基醇,即(E)-4-(2-(羟甲基)苯基)but-3-en-1-醇与各种醛进行平滑的Prins双环化Sc(OTf)3和4ÅMS在80°C下以高收率和高非对映选择性提供一系列新的1-(四氢呋喃-3-基)-1,3-二氢异苯并呋喃衍生物。