A Novel Approach Towards Dibenzylbutyrolactone Lignans Involving Heck and Radical Reactions: Application to (±)-Matairesinol Synthesis
作者:Rekha Singh、Gobind C. Singh、Sunil K. Ghosh
DOI:10.1002/ejoc.200700440
日期:2007.11
regio- and stereoselective Heck reaction of iodoarenes with vinylated malonates, generated in situ by fluoride-induced protiodesilylation of alkenylsilanols/disiloxanes to give functionalized styrenes and 1,4-diaryl-1-butenes has been developed. The dibenzylbutyrolactone lignan skeletons have been achieved from 1,4-diaryl-1-butenes by two routes involving diastereoselective radical cyclization as the key
碘芳烃与乙烯基丙二酸酯的高度区域和立体选择性 Heck 反应已被开发出来,该反应通过氟化物诱导的烯基硅烷醇/二硅氧烷的 protiodesyllation 原位生成,得到官能化的苯乙烯和 1,4-二芳基-1-丁烯。二苄基丁内酯木脂素骨架已通过两种途径从 1,4-二芳基-1-丁烯获得,其中非对映选择性自由基环化是关键步骤。该策略已成功应用于 (±)-matairesinol 的合成。 (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007)