Substitution of the acetoxy groups of dialkoxymethylacetates by organometallic reagents: a route to allyl-, propargyl-, homoallyl-, homopropargyl- and α-stannylacetals
作者:Isabelle Beaudet、Alain Duchêne、Jean-Luc Parrain、Jean-Paul Quintard
DOI:10.1016/0022-328x(92)83085-v
日期:1992.4
The substitution of the acetoxy groups of dialkoxymethylacetates by organometallic reagents has been examined in a search for new methods of preparing functional acetals. The efficiency of the substitution of the acetoxy group is highly dependent on the nature of the organometallic reagents: soft nucleophiles with strong electrophilic assistance by the counterion are the best reagents. Allyl-, propargyl-
为了寻找制备功能性乙缩醛的新方法,已经研究了用有机金属试剂取代二烷氧基甲基乙酸酯的乙酰氧基。乙酰氧基的取代效率高度依赖于有机金属试剂的性质:具有抗衡离子的强亲电助剂的柔软亲核试剂是最好的试剂。通过这种途径制备了烯丙基,炔丙基,高烯丙基,高炔丙基和α-锡烷基缩醛,其中二烷氧基甲基乙酸酯经常用作二烷基苯基原甲酸酯的有用替代物。