Asymmetric synthesis of sulfinyl-substituted arene chromium tricarbonyl complexes
作者:Stephen G. Davies、Tracey Loveridge、M. Fatima C. C. Teixeira、John M. Clough
DOI:10.1039/a907590i
日期:——
The synthesis of (SRSS)-[(phenylsulfinyl)benzene] chromiumtricarbonyl 5 and (SRSS)-[(p-tolylsulfinyl)benzene] chromiumtricarbonyl6 is achieved via a nucleophilic displacement reaction between the anion derived from (benzene) chromiumtricarbonyl 9 and a suitable sulfinate ester. Replacing the sulfinate ester with a chiral sulfinyl-transfer reagent allows the isolation of the non-racemic sulfinyl-substituted
Synthesis of new optically active sulfoxides with chelating properties
作者:Kai - U. Baldenius、Henri B. Kagan
DOI:10.1016/0957-4166(90)80010-v
日期:1990.1
2-pyridinylmethyl sulfoxides and β-imino sulfoxides was sought. The latter were obtained in tautomeric mixtures with their enamines by condensation of opticallyactive β-keto sulfoxides with primary amines. 2-Pyridinylmethyl sulfoxides were synthesized by sulfinate substitution. Titanium catalysed oxidation gave good results for the synthesis of (+)-8-(methylsulfinyl)quinoline from the corresponding
RICARD, LOUIS;REBIERE, FRANCOIS;KAGAN, HENRI B., C. R. ACAD. SCI. SER. 2, 312,(1991) N, C. 225-228
作者:RICARD, LOUIS、REBIERE, FRANCOIS、KAGAN, HENRI B.
DOI:——
日期:——
Synthesis of New Sulfoxide-Containing Diselenides and Unexpected Cyclization Reactions to 2,3-Dihydro-1,4-benzoselenothiine 1-Oxides
作者:Diana M. Freudendahl、Michio Iwaoka、Thomas Wirth
DOI:10.1002/ejoc.201000514
日期:——
functionalization of alkenes. The influence of solvents and different nucleophiles on the outcome of the selenenylation reaction was studied. Besides the successful selenenylation reactions, one selenium electrophile showed an unexpected reactivity in forming a six-membered heterocyclic system upon reaction with alkenes. A mechanism for the formation of these 2,3-dihydro-1,4-benzoselenothiine 1-oxides is proposed
Application of Chiral Mixed Phosphorus/Sulfur Ligands to Palladium-Catalyzed Allylic Substitutions
作者:David A. Evans、Kevin R. Campos、Jason S. Tedrow、Forrest E. Michael、Michel R. Gagné
DOI:10.1021/ja992543i
日期:2000.8.23
allylic substitution of cycloalkenyl acetates showed that 49g afforded the highest enantioselectivities (91−97% ee). Application of this methodology to heterocyclic substrates was developed as an efficient approach to the enantioselective synthesis of 3-substituted piperidines and dihydrothiopyrans. Models for asymmetric induction are discussed based on the absolute st...