An efficient, palladium-catalyzed, enantioselective synthesis of (2R)-3-butene-1,2-diol and its use in highly selective Heck reactions

被引:24
作者
Cheeseman, N [1 ]
Fox, M [1 ]
Jackson, M [1 ]
Lennon, IC [1 ]
Meek, G [1 ]
机构
[1] Chirotech Technol Ltd, Dowpharma, Cambridge CB4 0WG, England
关键词
D O I
10.1073/pnas.0307047101
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
A robust and scalable procedure for the palladium-catalyzed dynamic kinetic asymmetric transformation of 3,4-epoxy-1-butene into (2R)-3-butene-1,2-diol with water as the cosolvent is reported. Examination of the effects of solvent and temperature led to the identification of conditions that permitted use of 0.025 mol % catalyst, providing (2R)-3-butene-1,2-diol in 84% isolated yield and 85% enantiomeric excess. Subsequent Heck reactions with a diverse range of coupling partners are described and the influence of their electronic nature on maintaining the enantiopurity of the diol is discussed.
引用
收藏
页码:5396 / 5399
页数:4
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