Asymmetric oxidation of sulfides is one of current topics and many useful methodologies for this purpose have been mported to date.13) Some of these methodologies are well known to be also useful for the epexidation of olefins. However, differing from epoxidation, there is no good methodology for ca
Asymmetric benzylic oxidation using a Mn-salen complex as catalyst
โ Scribed by Kiyoe Hamachi; Ryo Irie; Tsutomu Katsuki
- Publisher
- Elsevier Science
- Year
- 1996
- Tongue
- French
- Weight
- 209 KB
- Volume
- 37
- Category
- Article
- ISSN
- 0040-4039
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A6structz Asymmetric oxidation of sulfkles was examined by using (salen)mangane&III) complexes as catalysrp and (8S,8'S,l"S,2"S)-complex (2b) was found to show high asymmetric induction up to 90% ee. Its diastercom \* (8R.8'R.l"S.2"S)-complex (la) that showed excellent asymmetric induction in the ep
R,R)-Zr(salen) complex was found to serve as an efficient catalyst for asymmetric Baeyer-Villiger oxidation of pro-chiral and racemic ketones using ureaโขhydrogen peroxide as the terminal oxidant: for example, high enantioselectivity of 87% ee was achieved in the Baeyer-Villiger reaction of 3-phenylc
Epoxidation of conjugated olef'ms has been examined with (salen)ehromium(III) complexes as catalysts. Although (salen)chromium(III) complexes were catalytically less active than the corresponding (salen)manganese(lll) complexes, the reactions with the chromium complexes were found to exhibit interes