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SILICA PHOSPHORIC ACID/NaNO2 AS A NOVEL HETEROGENEOUS SYSTEM FOR THE COUPLING OF THIOLS TO THEIR CORRESPONDING DISULFIDES |
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| Authors: | Mohammad Ali Zolfigol Farhad Shirini Khosrow Zamani Efat Ghofrani Satar Ebrahimi |
| Affiliation: | 1. Chemistry Department, College of Science, Bu-Ali Sina University , Hamadan, Iran;2. Chemistry Department, College of Science, Gilan University , Rasht, Iran;3. Chemistry Department, College of Science, Arak University , Arak, Iran |
| Abstract: | Silica phosphoric acid was prepared via reaction of silica chloride (I) and phosphoric acid. Thiols can be readily converted to their corresponding thionitrites with a combination of silica phosphoric acid (II), wet SiO 2 , and sodium nitrite in dichloromethane at room temperature. Disulfides result from the homolytic cleavage of the sulfur–nitrogen bond of the unstable thionitrite and subsequent coupling of the resultant thiyl radicals. |
| Keywords: | Disulfides silica chloride silica phosphoric acid thiols thionitrites (S-nitrosothiols) |