reactions of 1,3diphenyl-2-propenyl acetate (II). Best results are obtained with derivative (Ia). Dimethyl malonate as nucleophile gives the product (IV) with high e.e., whereas benzylamine provides only moderate stereoselectivity. -(JIN, MYUNG-
New chiral phosphinooxazolidine ligands for palladium-catalyzed asymmetric allylic substitution
โ Scribed by Myung-Jong Jin; Jung-Ae Jung; Sang-Han Kim
- Book ID
- 104261719
- Publisher
- Elsevier Science
- Year
- 1999
- Tongue
- French
- Weight
- 115 KB
- Volume
- 40
- Category
- Article
- ISSN
- 0040-4039
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โฆ Synopsis
New chiral phosphinooxazolidines were prepared and examined as chiral ligands in Pd-catalyzed asymmetric allylic substitution reaction of 1,3-diphenyl-2propenyl acetate with dimethyl malonate or benzylamine. Enantioselectivity up to 9896 was observed.
๐ SIMILAR VOLUMES
New chiral ligands, phosphinooxathianes 3 and 6, were synthesized easily and their ability as ligands were examined in Pd-catalyzed asymmetric allylic alkylation of 1,3-diphenyl-2-propenyl acetate with dimethyl malonate to give an allylation product. Enantiomeric excess of up to 94% has been obtaine
Chiral phosphinoimidazolidine 3 was used as an excellent ligand in Pd-catalyzed asymmetric allylic alkylation of racemic 1,3-diphenyl-2-propenyl acetate 5 with dimethyl malonate. Outstanding enantioselectivity of up to 99% and remarkable catalytic activity were observed. The ligand was also found to