Synthesis of Furano[2,3-<i>c</i>]pyran-3-one and Thieno[2,3-<i>c</i>]pyran-3-one Derivatives through the Coupling of 3-Alkynyl-2-heteroaromatic Carboxaldehydes with Fischer Carbene Complexes: Total Synthesis of a <i>Baccharis</i>-Derived Cadinene Derivative
作者:Yanshi Zhang、James W. Herndon
DOI:10.1021/jo011136y
日期:2002.6.1
The coupling of Fischer carbene complexes with 3-alkynyl-2-heteroaromatic carboxaldehyde derivatives has been examined. The reaction affords pyrones fused to furans or thiophenes in a single step. The compounds are stable enough for isolation. If the carbene complex features a remote alkene substituent, a subsequent Diels-Alder reaction can occur. This reaction has been used as the key step in the
已经研究了费歇尔卡宾配合物与3-炔基-2-杂芳族羧醛衍生物的偶联。该反应在单个步骤中提供与呋喃或噻吩融合的吡喃酮。这些化合物足够稳定,可以分离。如果卡宾络合物的特征是远端的烯烃取代基,则可能发生随后的Diels-Alder反应。该反应已用作合成天然卡丁烯衍生物的关键步骤。