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A systematic study of chiral homoprolinols and their derivatives in the catalysis of enantioselective addition of diethylzinc to aldehydes

✍ Scribed by Chang-Lu Liu; Chang-Yong Wei; Shi-Wen Wang; Yun-Gui Peng

Publisher
John Wiley and Sons
Year
2011
Tongue
English
Weight
444 KB
Volume
23
Category
Article
ISSN
0899-0042

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πŸ“œ SIMILAR VOLUMES

Synthesis of chiral ligands derived from
Synthesis of chiral ligands derived from the Betti base and their use in the enantioselective addition of diethylzinc to aromatic aldehydes
✍ Jun Lu; Xuenong Xu; Cunde Wang; Jiangang He; Yuefei Hu; Hongwen Hu πŸ“‚ Article πŸ“… 2002 πŸ› Elsevier Science 🌐 French βš– 131 KB

A novel procedure for selective direct N,N-alkylation of the chiral Betti base was developed, and a new family of chiral ligands, (S)-1-(a-cycloaminobenzyl)-2-naphthols, were prepared. The ligands with five-and six-membered cyclic amines showed highly efficient asymmetric induction in the addition o

Synthesis of new chiral imidazolidine di
Synthesis of new chiral imidazolidine disulfides derived from l-cystine and their application in the enantioselective addition of diethylzinc to aldehydes
✍ Antonio L Braga; Fabrı́cio Vargas; Claudio C Silveira; Leandro H de Andrade πŸ“‚ Article πŸ“… 2002 πŸ› Elsevier Science 🌐 French βš– 87 KB

Several chiral imidazolidine disulfides 4a-d derived from L-cystine have been synthesized. These ligands have been applied as chiral catalysts in the asymmetric addition of diethylzinc to aldehydes. The best results were obtained by employing 5 mol% of imidazolidine disulfide 4a, and chiral secondar