作者:Yoo Tanabe、Atsushi Makita、Syunsuke Funakoshi、Ryota Hamasaki、Tetsuo Kawakusu
DOI:10.1002/1615-4169(200207)344:5<507::aid-adsc507>3.0.co;2-u
日期:2002.7
An efficient, practical, and stereocontrolled synthesis of (Z)-civetone (1), a representative musk perfume, has been performed utilizing a Ti-Dieckmann (intramolecular Ti-Claisen) condensation of dimethyl (Z)-9-octadecenedioate (3) as the key step. This cyclization reaction has some advantages compared with the traditional basic Dieckmann condensation such as higher concentration (100–300 mM), lower
有效,实用,立体控制合成(Z)-西维酮(1),一种代表性的麝香香水,已经利用二-(Z)-9-十八碳烯二酸酯(3)的Ti-Dieckmann(分子内Ti-Claisen)缩合进行了合成。作为关键步骤。与传统的基本Dieckmann缩合反应相比,这种环化反应具有一些优势,例如更高的浓度(100–300 mM),更低的反应温度(0–5°C),更短的反应时间(1–3 h),使用对环境有益的(低毒性和安全的试剂(TiCl 4和Et 3 N或Bu 3N),以及经济的试剂和溶剂。还可以通过本方法制备15、17和19元饱和β-酮酸酯(6-8)。