Enantioselective ortho lithiation of tricarbonyl(masked phenol and aniline)chromium complexes
β Scribed by Motokazu Uemura; Yoshinori Hayashi; Yuji Hayashi
- Book ID
- 108036216
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 305 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0957-4166
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π SIMILAR VOLUMES
Sequential reaction of the tricarbonyl[(h 6 -phenyl) carbamate]chromium complex 3 with chiral amide bases (see 4 and 5) and electrophiles yielded planar chiral ortho-substituted complexes 6 with up to 70% enantiomeric excess (ee) (Scheme 2, Table 1 and2). The enantiomer purity could be increased to
Enantioselective Deprotonation/Electrophile Addition Reactions of Tricarbonyl(phenyl carbamate)chromium Complexes. -Optimized conditions are elaborated for the preparation of chiral ortho-substituted complexes staring from racemic complex (I). The enantiomeric purity of the products can be increase