Asymmetric Synthesis of (-)-(<i>E</i>)-5-Hydroxy-5-isopropyl-3-hepten-2-one, A Cembrane-Derived Compound from Greek Tobacco
作者:Makoto Shimazaki、Akihiro Ohta
DOI:10.1055/s-1992-26277
日期:——
The lithiation of (+)-N,N-dimethyl-1-(2-methylsulfinylphenyl)-ethylamine (2) with butyllithium followed by reaction with unsymmetrical ketones gave the corresponding tert-alcohols with high diastereoselectivity. By following this procedure, (R)-(E) -5-hydroxy-5-isopropyl-3-hepten-2-one (1), isolated from the extract of Greek tobacco, was synthesized and the absolute configuration on the asymmetric carbon determined.
(+)-N,N-二甲基-1-(2-甲基亚磺酰基苯基)-乙胺 (2) 与丁基锂发生石化作用,然后与不对称酮反应,以高非对映选择性得到相应的叔醇。按照这一步骤,合成了从希腊烟草提取物中分离出来的 (R)-(E) -5- 羟基-5-异丙基-3-庚烯-2-酮 (1),并确定了不对称碳上的绝对构型。