作者:Bor‐Cherng Hong、Mahanandeesha Siddappa Hallur、Ju‐Hsiou Liao
DOI:10.1080/00397910600588520
日期:2006.6.1
Abstract A highly regio‐ and stereoselective hetero Diels–Alder cycloaddition of indene with N‐sulfonyl‐1‐aza‐1,3‐butadiene was achieved. Subsequent transformation of the 5H‐indeno [l,2‐b]pyridine via elimination and reduction provides a new route to azafluorenone (e.g., 1‐methyl‐4‐azafluorene) for the synthesis of onychnine.
摘要 实现了茚与 N-磺酰基-1-氮杂-1,3-丁二烯的高度区域和立体选择性杂Diels-Alder 环加成反应。5H-茚并[l,2-b]吡啶通过消除和还原的后续转化为氮杂芴酮(例如,1-甲基-4-氮杂芴)的合成提供了一条新途径。