Alkene epoxidation with

Vorstenbosch, M. L. W. Alkene Epoxidation with Silsesquioxane-Based Chromium and Titanium Complexes, Schuit Institute of Catalysis, Eindhoven, 2002. 

Scheme 3.6 Alkene epoxidation with a pyridine-containing macrocycle bearing a pendant arm.

Scheme 10.11 Mixed catalytic cycle for hydroperoxide formation in alkane oxygenation and alkene epoxidation with HOOH and cw-VO(bpy)2Y, via a homolytic and heterolytic cleavage of peroxo intermediates, respectively (after Knops-Gerrits et alPTi).

Potassium 1-alkenyltrifluoroborates permitted alkene epoxidation with oxone or m-CPBA with excellent conversions without cleavage of the G-B bond (Equation (77)).448... 

The epoxidation of alkenes by 02 is catalyzed by polydentate iron and by cobalt porphyrin complexes the latter also operate in a perfluoroalkane/MeCN biphasic system.166 Ruthenium complexes, such as (22-XL), catalyze alkene epoxidations with bis(acetoxy)iodobenzene.167... 

Yawalkar AA, Pangarkar VG, and Baron GV. Alkene epoxidation with peroxide in a catalytic membrane reactor A theoretical study. J Membr Sci 2QQ -, 182 129-137. 

M. C. White, A. G. Doyle, E. N. Jacobsen, A synthetically useful, self assembling MMO mimic system for catalytic alkene epoxidation with aqueous H2O2, J. Am. Chem. Soc. 123,7194-7195 (2001). 

M. Klawonn, M. K. Tse, S. Bhor, C. Dobler, M. Beller, A convenient ruthenium-catalyzed alkene epoxidation with hydrogen peroxide as oxidant, J. Mol. Catal. A Chem. 218 (2004) 13. 

C. Venturello, R. D Alolslo, Quaternary ammonium tetrakis(diperoxotungsto)phosphates(3-) as a new class of catalysts for efficient alkene epoxidation with hydrogen peroxide, J. Org. Chem. 53 (1988) 1553. 

D. Mandelli, M. C. A. van Vliet, R. A. Sheldon, U. Schuchardt, Alumina-catalyzed alkene epoxidation with hydrogen peroxide, Appl. Catal. A Gen. 219 (2001) 209. 

S. Bhor, M. K. Tse, M. Klawonn, C. Dbbler, W. Magerlein, M. Beller, Ruthenium-catalyzed asymmetric alkene epoxidation with tert-butyl hydroperoxide as oxidant, Adv. Synth. Catal. 346 (2004) 263. 

M. Ono, 1. Okura, Qn the reaction mechanism of alkene epoxidation with Methylosinus trichosporium (OB3b),/. Mol. Catal. 61 (1990) 113. 

M. C. Curet-Arana, G. A. Emberger, L. J. Broadbelt, R. Q. Snurr, Quantum chemical determination of stable intermedicates for alkene epoxidation with Mn-prophyrin catalysts, /. Molec. Catal. A, In press. 

FIGURE 2.6 Mechanistic hypothesis for terminal alkene epoxidation with hydrogen peroxide mediated by lb on the basis of the results of reaction-progress kinetic analysis and P and F NMR studies. 

S. Banfi, F. Montanari, S. Quici, S. V. Barkanova, Q. L. Lakiya, V. N. Kopranenkov, E. A. Luk yanets, Porphyrins and azaporphines as catalysts in alkene epoxidations with peracetic acid. Tetrahedron Lett. 36 (1995) 2317. 

H. C. Sacco, Y. lamamoto, J. R. L. Smith, Alkene epoxidation with iodosylbenzene catalysed by polyionic manganese porphyrins electrostatically bound to counter-charged supports, /. Chem. Soc., Perkin Trans. 2 (2001) 181. 

We review here our results on alkene epoxidation with [WZnM2(ZnW9 034)2] polytungstozincate anions (M = Zn, Mn, or VO) as the catalyst and... 

E. A. Duban, K. P. Bryliakov, E. P. Talsi, The active intermediates of non-heme-iron-based systems for catalytic alkene epoxidation with H2Q2/CH3COOH, Eur.. Inorg. Chem. (2007) 852. 

In pursuit of biomimetic catalysts, metaUoporphyrins have been extensively studied in attempts to mimic the active site of cytochrome P450, which is an enzyme that catalyzes oxidation reactions in organisms. In recent decades, catalysis of alkene epoxidation with metaUoporphyrins has received considerable attention. It has been found that iron [1-3], manganese [4,5], chromium [6], and cobalt porphyrins can be used as model compounds for the active site of cytochrome P450, and oxidants such as iodosylbenzene, sodium hypochlorite [7,8], hydrogen peroxide [9], and peracetic acid [10] have been shown to work for these systems at ambient temperature and pressure. While researchers have learned a great deal about these catalysts, several practical issues limit their applicability, especially deactivation. 

In early 1990s Mukaiyama and co-workers have found that the use of branched aliphatic aldehydes as the reducing agents provide alkene epoxidation with impressively high selectivity under mild reaction conditions [6-8]. Co-oxidation of alkenes with aldehydes... 

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