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Synthesis of Aminoboronic Acid Derivatives from Amines and Amphoteric Boryl Carbonyl Compounds
Author(s) -
Diaz Diego B.,
Scully Conor C. G.,
Liew Sean K.,
Adachi Shinya,
Trinchera Piera,
St. Denis Jeffrey D.,
Yudin Andrei K.
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201605754
Subject(s) - chemistry , iminium , conjugated system , tautomer , molecule , combinatorial chemistry , boron , organic chemistry , condensation , ion , polymer , physics , thermodynamics
Herein, we demonstrate the use of α‐boryl aldehydes and acyl boronates in the synthesis of aminoboronic acid derivatives. This work highlights the untapped potential of boron‐substituted iminium ions and offers insights into the behavior of N ‐methyliminodiacetyl (MIDA) boronates during condensation and tautomerization processes. The preparative value of this contribution lies in the demonstration that various amines, including linear and cyclic peptides, can be readily conjugated with boron‐containing fragments. A mild deprotection of amino MIDA‐boronates enables access to α‐ and β‐aminoboronic acids in high chemical yields. This simple process should be applicable to the synthesis of a wide range of bioactive molecules as well as precursors for cross‐coupling reactions.