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Asymmetric Michael reaction of an α-cyano Weinreb amide catalyzed by a rhodium complex with trans-chelating chiral diphosphine PhTRAP

✍ Scribed by Masaya Sawamura; Hitoshi Hamashima; Hajime Shinoto; Yoshihiko Ito

Publisher
Elsevier Science
Year
1995
Tongue
French
Weight
160 KB
Volume
36
Category
Article
ISSN
0040-4039

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Catalytic asymmetric hydrogenation of 1-aza-2-cycloalkene-2-carboxylates catalyzed by a trans-chelating chiral diphosphine PhTRAP-rhodium complex
✍ Ryoichi Kuwano; Daisuke Karube; Yoshihiko Ito 📂 Article 📅 1999 🏛 Elsevier Science 🌐 French ⚖ 289 KB

A rhodium complex coordinated with a trans-chelating chiral diphosphine (S,S)-(R,R)-PhTRAP was an effective catalyst for asymmetric hydrogenation of N-acyl-1-aza-2-cycloalkene-2-carboxylates, which gave the corresponding protected cyclic or-amino acids with 73-97% ee.

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