Synthesis and characterization of boronates derived from non-symmetric amino-bis-phenols
摘要:
The condensation of 2-[[(2-hydroxyphenyl) amino]methyl]-phenols (1a-1e) with different arylboronic acids led to 12 new monomeric boronates of the type 2-aryl-dibenzo[d,h]-6-aza-1,3-dioxa-2-boracyclononene (2a-21). The boronates were characterized by H-1-, C-13-, B-11- and 2D-NMR experiments, FT infrared, mass spectra and elemental analyses. The stereochemistry of the H-N -> B-Ph fusion is always cis, as established through the NMR spectra, as well as the X-ray structures of four boronates (2a, 2e, 2f and 21). Hydrogen bonds between the amine proton and the oxygen ester of the five- membered ring are present in three X-ray structures (2a, 2e and 2f), while the supramolecular structure in the derivative possessing a primary amine (21) is built up through the protons present in this moiety instead of the proton from the H-N -> B-Ph fragment. (c) 2005 Elsevier B.V. All rights reserved.
Synthesis and characterization of boronates derived from non-symmetric amino-bis-phenols
摘要:
The condensation of 2-[[(2-hydroxyphenyl) amino]methyl]-phenols (1a-1e) with different arylboronic acids led to 12 new monomeric boronates of the type 2-aryl-dibenzo[d,h]-6-aza-1,3-dioxa-2-boracyclononene (2a-21). The boronates were characterized by H-1-, C-13-, B-11- and 2D-NMR experiments, FT infrared, mass spectra and elemental analyses. The stereochemistry of the H-N -> B-Ph fusion is always cis, as established through the NMR spectra, as well as the X-ray structures of four boronates (2a, 2e, 2f and 21). Hydrogen bonds between the amine proton and the oxygen ester of the five- membered ring are present in three X-ray structures (2a, 2e and 2f), while the supramolecular structure in the derivative possessing a primary amine (21) is built up through the protons present in this moiety instead of the proton from the H-N -> B-Ph fragment. (c) 2005 Elsevier B.V. All rights reserved.
Synthesis and characterization of boronates derived from non-symmetric amino-bis-phenols
作者:Arturo Abreu、S. Jesùs Alas、Hiram I. Beltrán、Rosa Santillan、Norberto Farfán
DOI:10.1016/j.jorganchem.2005.08.042
日期:2006.1
The condensation of 2-[[(2-hydroxyphenyl) amino]methyl]-phenols (1a-1e) with different arylboronic acids led to 12 new monomeric boronates of the type 2-aryl-dibenzo[d,h]-6-aza-1,3-dioxa-2-boracyclononene (2a-21). The boronates were characterized by H-1-, C-13-, B-11- and 2D-NMR experiments, FT infrared, mass spectra and elemental analyses. The stereochemistry of the H-N -> B-Ph fusion is always cis, as established through the NMR spectra, as well as the X-ray structures of four boronates (2a, 2e, 2f and 21). Hydrogen bonds between the amine proton and the oxygen ester of the five- membered ring are present in three X-ray structures (2a, 2e and 2f), while the supramolecular structure in the derivative possessing a primary amine (21) is built up through the protons present in this moiety instead of the proton from the H-N -> B-Ph fragment. (c) 2005 Elsevier B.V. All rights reserved.