๐”– Bobbio Scriptorium
โœฆ   LIBER   โœฆ

New chiral phosphinooxazolidine ligands for palladium-catalyzed asymmetric allylic substitution

โœ 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

No coin nor oath required. For personal study only.

โœฆ 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.


๐Ÿ“œ SIMILAR VOLUMES


ChemInform Abstract: New Chiral Phosphin
โœ Myung-Jong Jin; Jung-Ae Jung; Sang-Han Kim ๐Ÿ“‚ Article ๐Ÿ“… 2010 ๐Ÿ› John Wiley and Sons โš– 29 KB ๐Ÿ‘ 1 views

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 phosphinooxathiane ligands fo
โœ Hiroto Nakano; Yuko Okuyama; Hiroshi Hongo * ๐Ÿ“‚ Article ๐Ÿ“… 2000 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 178 KB

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

New chiral phosphinoimidazolidine ligand
โœ Myung-Jong Jin; Sang-Han Kim; Sang-Joon Lee; Young-Mok Kim ๐Ÿ“‚ Article ๐Ÿ“… 2002 ๐Ÿ› Elsevier Science ๐ŸŒ French โš– 116 KB

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