Construction of Large Carbocyclic Rings by<i>Ireland-Claisen</i>Rearrangement of<i>O</i>-Silylated Lactone Enolates: Synthesis of (±)-muscone
作者:Rudolf K. Brunner、Hans-Jürg Borschberg
DOI:10.1002/hlca.19830660827
日期:1983.12.14
yield of 24%. The key steps involve an efficient transformation of the readily accessible 14-hydroxy-15-methyl-15-hexadecenoic acid (9) into the tetradecanolide 1 and a subsequent Ireland-Claisen rearrangement of its triethylsilyl enolate 2 to a 8:1-mixture of the stereoisomeric 15-membered carbocycles 4 and 10(Scheme 4).
(±)-Muscone (5)是由13-(氯甲酰基)十三烷酸甲酯(6)分九步合成的,总收率为24%。的关键步骤涉及容易获得14-羟基-15-甲基-15-十六碳烯酸的有效变换(9)到所述tetradecanolide 1和随后的爱尔兰-克莱森其三乙基烯醇的重排2至8:1混合物立体异构的15元碳环4和10 (方案4)。