A General Enantioselective Approach to Jasmonoid Fragrances: Synthesis of (+)-(1<i>R</i>,2<i>S</i>)-Methyl Dihydrojasmonate and (+)-(1<i>R</i>,2<i>S</i>)-Magnolione
作者:Alessio Porta、Giovanni Vidari、Giuseppe Zanoni
DOI:10.1021/jo050423p
日期:2005.6.1
Methyl dihydrojasmonate 1 and magnolione 3 are of both academic and industrial interest. In this paper, we describe a flexible, high-yielding route to diastereomerically pure (+)-cis-(1R,2S)-methyl dihydrojasmonate 1 and the first synthesis of (+)-cis-(1R,2S)-magnolione 3, both with enantiomeric excesses up to 93%. The two syntheses diverged from the same advanced intermediate 5, readily available
二氢茉莉酮酸甲酯1和厚朴酮3具有学术和工业价值。在本文中,我们描述了一种灵活的,高产路线对映异构纯(+) -顺式- (1 - [R,2小号) -甲基二氢茉莉1和(+)第一合成-顺式- (1 - [R,2小号)-magnolione 3,两者的对映体过量均高达93%。两种合成是从相同的高级中间体5衍生而来的,该中间体易于从对映体富集的羟甲基δ-内酯(-)-(3a S,4 S,6a R)-6中获得。报告了(1 R,2 S)-1和(1 R,2 S)-3的嗅觉特性。