Highly enantio- and diastereoselective reduction of sulfur-functionalized cyclic ketones with baker's yeast
作者:Tamotsu Fujisawa、Kengo Yamanaka、Bingidimi I. Mobele、Makoto Shimizu
DOI:10.1016/s0040-4039(00)92638-8
日期:1991.1
Bakers' yeastreduction of 2-phenyltiocyclopentanone, 2-phenylthiocyclohexanone, and 2-phenylthio-2-cyclopentenone affords the corresponding (1S,2R)-2-phenylthiocycloalkanols in optically pure form and excellent diastereomeric excess.
The first example of salan-vanadium catalyzed enantioselective ring-opening of meso-epoxides has been reported, which furnished β-hydroxy sulfides in good yields and moderate enantioselectivities.
Efficient Ring-Opening Reaction of Epoxides and Aziridines Promoted by Tributylphosphine in Water
作者:Ren-Hua Fan、Xue-Long Hou
DOI:10.1021/jo025983s
日期:2003.2.1
Tributylphosphine was found to be an effective promoting reagent for the ring-openingreaction of various epoxides and aziridines with nucleophile to produce corresponding anti-bifunctional products in moderate to excellent yields in water.
Convenient preparation of ytterbium(III) chalcogenolate complexes by insertion of ytterbium into chalcogen-chalcogen bonds. Application in the ring-opening of epoxides
Convenient conditions are reported for the preparation of ytterbium(III) chalcogenolate complexes by insertion of ytterbium metal into the chalcogen–chalcogen bond of disulfides, diselenides, and ditellurides. The resulting complexes have been found to transfer arylsulfanyl, -selenanyl, and -telluranyl groups to epoxides in a facile ring-opening reaction. The ytterbium(III) chalcogenolate complexes