✦ LIBER ✦
ChemInform Abstract: Highly Endo- and Enantioselective Asymmetric Nitrone Cycloadditions Catalyzed by the Aqua Complex of 4,6-Dibenzofurandiyl-2,2′-bis(4-phenyloxazoline)—Nickel(II) Perchlorate. Transition Structure Based on Dramatic Effect of MS 4A on Selectivities.
✍ Scribed by Shuji Kanemasa; Yoji Oderaotoshi; Junji Tanaka; Eiji Wada
- Publisher
- John Wiley and Sons
- Year
- 2010
- Weight
- 37 KB
- Volume
- 30
- Category
- Article
- ISSN
- 0931-7597
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✦ Synopsis
Highly Endo-and Enantioselective Asymmetric Nitrone Cycloadditions Catalyzed by the Aqua Complex of 4,6-Dibenzofurandiyl-2,2'bis(4-phenyloxazoline)-Nickel(II) Perchlorate. Transition Structure Based on Dramatic Effect of MS 4A on Selectivities.
-The aqua complex derived from the chiral ligand and Ni(ClO 4 ) 2 •6H 2 O acts as excellent chiral Lewis acid catalyst. The presence of mol. sieves 4A in the title reaction is essential to obtain the high enantioselectivities up to ¿99%. -(KANEMASA,