Journal
JOURNAL OF ORGANIC CHEMISTRY
Volume 86, Issue 9, Pages 6780-6786Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.joc.1c00507
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Funding
- Sichuan Science and Technology Program [2021YJ0398]
- U.S. National Science Foundation [CHE-1855443]
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A new bisBINOL-based fluorescent probe was synthesized, showing good enantioselective fluorescence responses towards 17 common amino acids. The recognition process was further investigated through the synthesis of diastereomeric imines and their reactions with Zn(OAc)(2).
Condensation of the methoxymethyl-protected (R)-3,3'-diformyl-1,1'-bi-2-naphthol (BINOL) with (pyridine-2,6-diylbis(methylene))bis(triphenyl phosphonium)dibromide in the presence of a base followed by deprotection gave a new bisBINOL-based fluorescent probe (R,R)-4. This compound showed expanded substrate scope in the recognition of amino acids with good enantioselective fluorescence responses toward 17 common amino acids. Two diastereomeric imines were synthesized from the condensation of (R,R)-4 with L- and D-valine, and the reactions of these imines with Zn(OAc)(2) were investigated by various spectroscopic methods for a better understanding of the enantioselective fluorescent recognition process.
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