Iodide dealkylation of benzyl, PMB, PNB, and t-Butyl N-acyl amino acid esters via lithium ion coordination
作者:Jack W. Fisher、Kristina L. Trinkle
DOI:10.1016/s0040-4039(00)77156-5
日期:1994.4
iodide promotes ester dealkylation in compounds containing an amide carbonyl in the γ-position to the ester carbonyl, as is found in N-acyl amino acid esters. Activation of the ester carbonyl via lithium ion coordination is facilitated by aprotic non-polar solvents such as THF and EtOAc. This process is not limited to methyl esters but readily dealkylates benzyl, PMB, PNB, and t-butyl esters and is especially
如在N-酰基氨基酸酯中发现的,碘化锂促进在γ-位含有羰基的酰胺羰基的化合物中的酯脱烷基。非质子惰性非极性溶剂(例如THF和EtOAc)有助于通过锂离子配位作用活化羰基酯。该方法不限于甲基酯,而是易于使苄基,PMB,PNB和叔丁基酯脱烷基化,并且由于条件温和而特别适合与β-内酰胺酯一起使用。