Photoreactions of cyclic sulfite esters: Evidence for diradical intermediates
نویسندگان
چکیده
The photochemistry of a phenyl and 1,2-diphenyl substituted sulfite ester is reported. The performance of photoreactions under relatively mild reaction conditions enables the detection of products that have not been observed in previous studies. It is concluded that, complementary to the initially proposed carbene intermediates, diradicals may also be considered.
منابع مشابه
Deprotection of Benzyl and t-Butyl Phosphate, Phosphite, and Sulfite Esters by Silica Chloride
Deprotection of phosphate, phosphate, and sulfite esters by silica chloride is described. Silica chloride is a mild, selective, and effective reagent for cleavage of benzyl and t-butyl esters of the above compounds.
متن کاملPhotoinduced [4 + 4], [4 + 2], and [2 + 2] cycloadditions of o-quinones with oxazoles: chemo-, regio-, and diastereoselectivity.
Photoinduced reactions of the 1,2-dicarbonyl compounds phenanthrenequinone (PQ), 1-acetylisatin (IS), and benzil (BZ) with the oxazoles 1a-j have been investigated. In photoreactions of PQ with the oxazoles, in addition to the 1,4-dioxins derived from [4 + 2] cycloaddition and the oxetanes from the Paternó-Büchi [2 + 2] reactions, [4 + 4] cycloaddition products are formed in the reactions with ...
متن کاملElectrocatalytic oxidation of sulfite Ion at the surface carbon ceramic modified electrode with prussian blue
The redox properties of sulfite ion has been examind using cyclic voltammetry in acetonitrile solvent at the surface of gold, pelatin and glassy carbon electrodes. It has bben found tha, sulfite ion exhibits two electron oxidation peak with EC’ mechanism. A novel chemically modified electrode containing Prussian blue complex and multi wall carbon nanotubes (MWCNs) was achieved on the surface of...
متن کاملFemtosecond b-cleavage dynamics: Observation of the diradical intermediate in the nonconcerted reactions of cyclic ethers
Femtosecond ~fs! dynamics of reactions of cyclic ethers, symmetric and asymmetric structures, are reported. The diradical intermediates and their b-cleavages, which involve simultaneous C-C, C-H s-bond breakage and C-O, C-C p-bond formation, are observed and studied by fs-resolved mass spectrometry. To compare with experiments, we present density functional theory calculations of the potential ...
متن کاملCharacterization and Investigation of Benzylic Carbenium Ion and Carbanion Ion-diradical Intermediates with 3,5- Disubstiuted Π–donors/acceptors
Title of Document: CHARACTERIZATION AND INVESTIGATION OF BENZYLIC CARBENIUM ION AND CARBANION ION-DIRADICAL INTERMEDIATES WITH 3,5DISUBSTIUTED π–DONORS/ACCEPTORS Raffaele Romano Perrotta, Doctor of Philosophy, 2012 Directed by: Professor Daniel E. Falvey Department of Chemistry & Biochemistry High-spin magnetic materials have been based on monomeric units that contain metals. Far less research ...
متن کامل