In the presence of micromolar peroxides or biometals (Fe(III), Cu(II), V(V) salts), and following a strong acid input, the stable 3-phenyl-2H-1,4-benzothiazine is efficiently converted to a green-blue Δ2,20 -bi(2H-1,4-benzothiazine) chromophore via dehydrogenative coupling of a 1,4-benzothiazinyl radical. The new system is of potential practical interest for colorimetric peroxide and redox biometal etection.
Red-Hair-Inspired Chromogenic System Based on a Proton-Switched Dehydrogenative Free-Radical Coupling / Loredana Leone;Orlando Crescenzi;Riccardo Amorati;Luca Valgimigli;Alessandra Napolitano;Vincenzo Barone;Marco d’Ischia. - In: ORGANIC LETTERS. - ISSN 1523-7060. - STAMPA. - 15:(2013), pp. 4944-4947. [10.1021/ol402161j]
Red-Hair-Inspired Chromogenic System Based on a Proton-Switched Dehydrogenative Free-Radical Coupling
AMORATI, RICCARDO;VALGIMIGLI, LUCA;
2013
Abstract
In the presence of micromolar peroxides or biometals (Fe(III), Cu(II), V(V) salts), and following a strong acid input, the stable 3-phenyl-2H-1,4-benzothiazine is efficiently converted to a green-blue Δ2,20 -bi(2H-1,4-benzothiazine) chromophore via dehydrogenative coupling of a 1,4-benzothiazinyl radical. The new system is of potential practical interest for colorimetric peroxide and redox biometal etection.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
