A general method for the synthesis of 2-alkyl substituted 1,3-dienes starting from 2-(chloromethyl)-3-tosylpropene
作者:Carmen Nájera、José Miguel Sansano
DOI:10.1016/s0040-4020(01)85650-7
日期:1994.1
The alkylation of the monolithium derivative 5 of 2-(chloromethyl)-3-tosylpropene (1) with bromo- or iodo-methyltrimethylsilane affords the β-silyl sulfone 7, which after nucleophilic substitution of the chlorine atom followed by β-elimination of tosyltrimethylsilane, promoted by tetrabutylammonium fluoride (TBAF), gives 2-substituted conjugated dienes 6 and the outer-ring diene 14. Racemic ipsenol
2-(氯甲基)-3-甲苯磺酰基丙烯(1)的单锂衍生物5与溴代或碘代甲基三甲基硅烷烷基化得到β-甲硅烷基砜7,在亲核取代氯原子后,β-消除了甲苯磺酰基三甲基硅烷,由四丁基氟化铵(TBAF)促进,得到2-取代的共轭二烯6和外环二烯14。制备外消旋ipsenol(10b),这是树皮甲虫Ips paraconfusus Lanier的聚集信息素。