The absence of a coupling reaction between a phosphinic acid and an amino ester during activation with the reagents BOP or PyBOP allowed the synthesis of phosphinopeptides from phospho-analogues of dipeptides, unprotected on the phosphinic acid.
The absence of a coupling reaction between a phosphinic acid and an amino ester during activation with the reagents BOP or PyBOP allowed the synthesis of phosphinopeptides from phospho-analogues of dipeptides, unprotected on the phosphinic acid.
Synthesis and Comparative Study on the Reactivity of Peptidyl-Type Phosphinic Esters: Intramolecular Effects in the Alkaline and Acidic Cleavage of Methyl β-Carboxyphosphinates
Using the phosphinic analogue of Cbz-Phe-Gly-OEt 1a as a template for this study, several phosphinic esters (2a-g) were prepared, employing an efficient method for each case. The reactivity of these derivatives under conventional deprotection conditions was studied, and the results are listed comparatively. The effect of steric hindrance as well as the contribution of neighboring groups in the rate