Chemistry of oxaziridines. 17. N-(Phenylsulfonyl)(3,3-dichlorocamphoryl)oxaziridine: a highly efficient reagent for the asymmetric oxidation of sulfides to sulfoxides
作者:Franklin A. Davis、R. Thimma Reddy、Wei Han、Patrick J. Carroll
DOI:10.1021/ja00030a045
日期:1992.2
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
Abstract The asymmetric Favorskii rearrangement of opticallyactive α‐haloketones, which are easily prepared from chiral menthyl‐4‐toluenesulfoxide in several steps using primary or secondary amines, yields their corresponding secondary or tertiary chiral amides. The secondary chiral amides were converted to acids or amines using acylation followed by hydrolysis or reduction. In addition, the tertiary
Application of a novel 1,3-diol with a benzyl backbone as chiral ligand for asymmetric oxidation of sulfides to sulfoxides
作者:Paramartha Gogoi、Trimurthulu Kotipalli、Kiran Indukuri、Somasekhar Bondalapati、Pipas Saha、Anil K. Saikia
DOI:10.1016/j.tetlet.2012.03.077
日期:2012.5
A chiral 1,3-diol with a benzyl backbone has been used for the asymmetricoxidation of sulfides to sulfoxides. Moderate to good yields and enantioselectivity (upto 87% ee) have been observed.
Chiral Brønsted-Acid-Catalyzed Asymmetric Oxidation of Sulfenamide by Using H<sub>2</sub>O<sub>2</sub>: A Versatile Access to Sulfinamide and Sulfoxide with High Enantioselectivity
Herein, we describe an example of catalyticasymmetricsynthesis of sulfinamides. Aromatic sulfenamides were chosen as useful substrates, because of the indispensable N–H bond, which could form an efficient hydrogen bond with chiral phosphoric acid. H2O2 (35%) was used as the terminal oxidant for preparation of sulfinamides in high yields and enantioselectivities, which could be easily derivatized
在本文中,我们描述了亚磺酰胺催化不对称合成的一个例子。选择芳香亚磺酰胺作为有用的底物,因为它不可缺少的NH键可以与手性磷酸形成有效的氢键。H 2 O 2(35%)被用作末端氧化剂,以高收率和对映选择性制备亚磺酰胺,可以很容易地衍生为亚砜和其他亚磺酰胺,而不会损失对映选择性。
ASYMMETRIC SYNTHESIS OF CHIRAL SULFOXIDES<i>VIA</i>MICROBIAL OXIDATION OF SULFIDES
Incubation of alkyl aryl and allyl aryl sulfides with growing cells of Corynebaoterium equi IFO 3730 gave the corresponding opticallyactivesulfoxides of high enantiomeric excess.