Abstract Many methods for conversion of carboxylic acids into the corresponding esters with various reagents have been described.1 We report now a one-step synthesis of esters 4 (see Table) from the tertiary ammonium salt of 1 and N,N-bis(2-oxo-3-oxazolidiny1)phosphordiamidic chloride 2. This reagent has been succesfully used in thioestes formation1 and lactonization;2,3 furthemore, 2 is considered interesting for macrolide synthesis.

中文翻译：

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N, N-Bis (2-Oxo-3-Oxazolidinyl) Phosphordiamidic Chloride (CLSPO)：酯功能制备的新策略

摘要 已经描述了使用各种试剂将羧酸转化为相应酯的许多方法。 1 我们现在报告了从 1 和 N,N-双 (2) 的叔铵盐一步合成酯 4（见表） -oxo-3-oxazolidiny1)phosphordiamidic chloride 2. 该试剂已成功用于硫酯的形成 1 和内酯化；2,3 此外，2 被认为对大环内酯合成感兴趣。