Enhanced transformation of sulfonamide antibiotics by manganese(IV) oxide in the presence of model humic constituents
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In the presence of iron(II) chloride (FeCl2 ; 20 mol%) and potassium tert-butoxide (t- BuOK; 4 equiv.) in dimethyl sulfoxide (DMSO), aryl and heteroaryl iodides undergo stereoselective Mizoroki–Heck C—C cross-coupling reactions with styrenes at 60 8C givin ...
Imidazolium- and pyridinium-based ionic liqs. with ether/polyether substituents have been evaluated as solvents for palladium-catalyzed Suzuki C-C coupling reactions. In general, reactions proceed more efficiently in these solvents compared to other ionic ...
The goal of this thesis was to find conditions to form C-C double bond and single bond using sulfonyl derivativies, which are arising from the Vogel's oxyallylation cascades. In a second chapter, it is shown that 2-methylprop-2-ene-1-sulfonyl fluorides can ...
1-Alkenyl chlorides, bromides or iodides, e.g., cis-1-chloro-1-octene, can be obtained with very high cis selectivities by Wittig reactions with a-chloro, a-bromo and a-iodo ylides derived from (2-MeOCH2C6H4)3P. The corresponding a-methoxy substituted ylid ...
New conditions have been found for the desulfitative Mizoroki-Heck arylation and trifluoromethylation of mono- and disubustituted olefins with arenesulfonyl and trifluoromethanesulfonyl chlorides. Thus (E)1,2-disubstituted alkenes with high stereoselectivi ...
Toluene oxidn. over Pb/Li/MgO is investigated in a tubular fixed bed reactor at low conversions. A periodic process alternating toluene oxidn. in absence of oxygen in the feed and regeneration of the catalyst by oxygen presents important changes in product ...
