Diastereoselective Synthesis of Phosphinic Dipeptide Isosteres: Domino Chirality Transfer during a Stereocontrolled
Angelos Lelis1, Nikolaos Skoulikas1, Mirto Papathanasopoulou1
1Laboratory of Organic Chemistry, Department of Chemistry, National and Kapodistrian University of Athens, Panepistimiopolis, Zografou, 15784 Athens, Greece.
Abstract:
A highly diastereoselective P-Michael addition of chiral aminophosphinic acids to achiral acrylates has been developed, leading to phosphinic dipeptide isosteres in high yields and dr of up to >50:1. The method allows for the diastereoselective preparation of target compounds without the need for chiral auxiliaries or P-chiral substrates. A possible mechanistic explanation involves a domino chirality transfer from the aminophosphinic acid to the P center, amplified by a crucial benzhydryl ester group, and then to the α-carbon.
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