申请人:ARCH DEVELOPMENT CORPORATION
公开号:EP0418013A2
公开(公告)日:1991-03-20
A method for magnesiating a compound substituted with one or more activating groups beta (ortho) to a carbon atom having a hydrogen substituent to be deprotonated. The compound is either a saturated cyclic compound in which the carbon-carbon bonds are strained greater than the carbon-carbon bonds of cyclobutane, or an unsaturated compound in which the carbon atom to be deprotonated is located no more than one position away from a pi-bonded carbon atom. The method contacts the substituted compound with a reactant having the formula:
wherein W is:
and R₁, R₂, R₃ and R₄ independently include hydrogen, alkyl, aryl, alkylaryl, and heteroaryl, or R and R₂ and/or R₃ and R₄ together form a cyclic residue. Compounds substituted with one or more magnesium-containing groups and one or more activating groups are also disclosed. The activated compounds are either saturated cyclic compounds having carbon-carbon bonds that are strained greater than the carbon-carbon bonds of cyclobutane, or unsaturated compounds. The one or more magnesium-containing groups have the structure:
with R₁ and R₂ independently including hydrogen, alkyl, aryl, alkylaryl, and heteroaryl, or R₁ and R₂ together forming a cyclic residue. A method by which such compounds are reacted with electrophilic reagents replacing the magnesium containing groups with substituent groups is also disclosed.
一种镁化化合物的方法,该化合物被一个或多个活化基团β(正交)取代,该基团与具有氢取代基的碳原子相连,该碳原子将被去质子化。该化合物可以是饱和环状化合物,其中碳-碳键的张力大于环丁烷的碳-碳键;也可以是不饱和化合物,其中需要去质子化的碳原子与π键碳原子的距离不超过一个位置。该方法将取代的化合物与具有以下式子的反应物接触:
其中 W 是
和 R₁、R₂、R₃ 和 R₄ 独立地包括氢、烷基、芳基、烷芳基和杂芳基,或 R 和 R₂ 和/或 R₃ 和 R₄ 共同形成环状残基。此外,还公开了被一个或多个含镁基团和一个或多个活化基团取代的化合物。活化化合物可以是饱和环状化合物,其碳-碳键的张力大于环丁烷的碳-碳键,也可以是不饱和化合物。一个或多个含镁基团的结构如下
R₁ 和 R₂ 独立地包括氢、烷基、芳基、烷芳基和杂芳基,或 R₁ 和 R₂ 共同形成环状残基。此外,还公开了一种方法,通过该方法,此类化合物可与亲电试剂反应,用取代基取代含镁基团。