Metalation of 4-Oxazolinyloxazole Derivatives. A Convenient Route to 2,4-Bifunctionalized Oxazoles
作者:Axel Couture、Pierre Grandclaudon、Christophe Hoarau、Joséphine Cornet、Jean-Pierre Hénichart、Raymond Houssin
DOI:10.1021/jo010762s
日期:2002.5.1
The synthesis of an array of 5-phenyloxazole derivatives bearing a variety of hydroxyalkyl groups at the C-2 position of the heterocyclic nucleus and possessing a formyl or a carboxyl function at C-4 is reported. These bifunctionalized compounds have been efficiently prepared by addition of carbonylated electrophiles to the 2-lithio derivative of 5-phenyloxazole preliminarily equipped with an oxazoline
据报道,合成了一系列在杂环核的C-2位带有多个羟烷基并在C-4具有甲酰基或羧基官能团的5-苯基恶唑衍生物。通过将羰基化的亲电试剂加到预先在恶唑核的4-位上装有恶唑啉单元的5-苯基恶唑的2-硫代衍生物中,可以有效地制备这些双官能化合物。证明了该方案具有双重优点,因为它抑制了麻烦的电环开环反应,并允许通过恶唑啉环系统的简单化学转化接近目标化合物。