98639-89-5Relevant academic research and scientific papers
Electrochemical enzymatic deoxygenation of chiral sulfoxides utilizing DMSO reductase
Abo, Mitsuru,Dejima, Makiko,Asano, Fumioki,Okubo, Akira,Yamazaki, Sunao
, p. 823 - 828 (2007/10/03)
Preparation of enantiomerically enriched sulfoxides by an electrochemical enzymatic system utilizing DMSO reductase was studied. This system consists of a glassy carbon electrode as the working electrode, methyl viologen as the mediator and DMSO reductase
Chemistry of oxaziridines. 17. N-(phenylsulfonyl)(3,3-dichlorocamphoryl)oxaziridine: A highly efficient reagent for the asymmetric oxidation of sulfides to sulfoxides
Davis, Franklin A.,Thimma Reddy,Han, Wei,Carroll, Patrick J.
, p. 1428 - 1437 (2007/10/02)
The synthesis, structure, and enantioselective oxidations of a new chiral N-sulfonyloxaziridine 12c [3,3-dichloro-1,7,7-trimethyl-2'-(phenylsulfonyl)spiro[bicyclo[2.2.1]heptane-2, 3'-oxaziridine]] are reported. This oxidant, which exhibits remarkably high and predictable ee's for the enantioselective oxidation of prochiral sulfides to sulfoxides, is prepared in three steps from (+)- or (-)-camphor in 50% overall yield. Steric effects are primarily responsible for the molecular recognition and are predictable using a simple active-site model where the nonbonded interactions between the RL and RS groups of the sulfide (RL-S-RS) and the active-site surface are minimized in a planar transition-state structure. The fact that alkyl aryl sulfides give high ee's in nonpolar solvents suggests that there is also a stereoelectronic component to the molecular recognition. High ee's (>90%) are anticipated for those sulfides where the difference in size of the groups directly bonded to the sulfur atom is large, i.e., aryl, tert-butyl vs CH2R (R = H, alkyl, benzyl, etc). The X-ray structure and studies with the dihydro, difluoro, and dibromo oxaziridines 12a, 12b, and 12d reveal that the exceptional enantioselectivities displayed by 12c are a consequence of a molecular cleft or groove, defined by the oxaziridine chlorine atoms and phenylsulfonyl group, on the active-site surface.
A FACILE ROUTE TO HOMOCHIRAL SULFOXIDES
Burgess, Kevin,Henderson, Ian
, p. 3633 - 3636 (2007/10/02)
Biocatalytic resolution of methyl sulfinylacetates afford sulfoxides (R)-(1)-(6) in very high optical yields; the products have been used in a systematic study of the "SPAC" reaction, an asymmetric synthesis of γ-hydroxy-α,β-unsaturated esters.
ENZYME MEDIATED SYNTHESIS OF OPTOCALLY ACTIVE ο-ARENESULFINYLALKANOIC ESTERS
Ohta, Hiromichi,Kato, Yasuo,Tsuchihashi, Gen-ichi
, p. 217 - 218 (2007/10/02)
Incubation of methyl arenesulfinylacetates and methyl α-benzenesulfinylpropionate with Corynebacterium equi IFO 3730 afforded the corresponding chiral sulfoxides of high optical purites in moderate to good chemical yields.
