Use of fluorescence spectroscopy on detection and control of contamination in food
| Full text | |
| Author(s): |
Barbeiro, Cristiane S.
;
Vasconcelos, Stanley N. S.
;
Zukerman-Schpector, Julio
;
Caracelli, Ignez
;
Pimenta, Daniel C.
;
Rodrigues, Ana Clara B.
;
Fernandes, Andre S.
;
Correra, Thiago C.
;
Bastos, Erick L.
;
Stefani, Helio A.
Total Authors: 10
|
| Document type: | Journal article |
| Source: | CHEMISTRYSELECT; v. 1, n. 18, p. 5647-5652, NOV 1 2016. |
| Web of Science Citations: | 5 |
| Abstract | |
A chlorinated 2-HNO (2-hydroxynaphthalenoxazoline) was synthesized by an ultrasound-assisted coupling reaction between 1-hydroxy-2-naphthoic acid and L-threonine followed by simultaneous halogenation and cyclization with inversion of configuration using excess SOCl2. Further functionalization of 2-HNO led to a small library of slightly fluorescent amides or esters in 55-81% yields. Quantum chemical calculations combined with high-resolution mass spectrometry analysis were used to rationalize the mechanism of reaction, and the formation of SCl3(+) as an electrophile is proposed. (AU) | |
| FAPESP's process: | 14/15962-5 - Reaction mechanism of asymmetric catalysts by mass spectrometry and gas-phase vibrational ion spectroscopy |
| Grantee: | Thiago Carita Correra |
| Support type: | Research Grants - Young Investigators Grants |
| FAPESP's process: | 13/17960-7 - Functionalization of 3-iodo-(L)-Tyrosine via Suzuki-Miyaura reaction using potassium organotrifluoroborate salts |
| Grantee: | Stanley Nunes Siqueira Vasconcelos |
| Support type: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 15/11769-9 - Isolation of Sharpless reaction intermediates epoxidation and characterization of these species by theoretical calculations |
| Grantee: | André Santos Fernandes |
| Support type: | Scholarships in Brazil - Scientific Initiation |