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    • 7. 发明申请
    • PROCESS FOR PREPARING ACTIVE ESTERS
    • 制备活性酯的方法
    • WO02048103A1
    • 2002-06-20
    • PCT/JP2001/010936
    • 2001-12-13
    • C07D207/46C07D417/12C07B41/12C07B43/00
    • C07D417/12C07D207/46
    • The invention relates to a mixture comprising a starting carboxylic acid, an esterifying reagent capable of forming an active ester, and a base; and a process for preparing active esters by adding a halogenating agent to a mixture obtained by mixing in an organic solvent a starting carboxylic acid with an esterifying reagent capable of forming an active ester and a base to conduct a reaction. Independent of the structure of the starting carboxylic acid, active esters useful as intermediates of drugs or the like can be each prepared from inexpensive reagents in one pot in a high yield without isomerization.
    • 本发明涉及包含起始羧酸,能够形成活性酯的酯化试剂和碱的混合物; 以及通过在有机溶剂中将起始羧酸与能够形成活性酯和碱进行反应的酯化试剂混合得到的混合物中加入卤化剂来制备活性酯的方法。 独立于起始羧酸的结构,可以用作药物等的中间体的活性酯各自以一个盆中廉价的试剂以高产率而不进行异构化制备。