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Synthesis of a novel chiral Schiff base of (R,R)-11,12-diamino-9,10-dihydro-9,10-ethanonanthracene and its application as ligand in Ti(IV) complex catalyzed asymmetric silylcyanation of aldehydes

Paper ID Volume ID Publish Year Pages File Format Full-Text
52311 46869 2007 4 PDF Available
Title
Synthesis of a novel chiral Schiff base of (R,R)-11,12-diamino-9,10-dihydro-9,10-ethanonanthracene and its application as ligand in Ti(IV) complex catalyzed asymmetric silylcyanation of aldehydes
Abstract

A novel chiral salen ligand (R,R)-2 was synthesized through the condensation of (R,R)-11,12-diamino-9,10-dihydro-9,10-ethanoanthracene and 3,5-di-tert-butylsalicylaldehyde. The (salen)Ti(IV) complex formed in situ upon the treatment of ligand 2 and Ti(OPr-i)4 was proved to be an efficient catalyst for the asymmetric trimethylsilylcyanation of aldehydes. The corresponding cyanohydrins were obtained in high yields (75–97%) with moderate to good enantioselectivities (48–76%).

Keywords
Chiral (salen)Ti(IV) complex; Asymmetric silylcyanation; Enantioselectivity; Aldehydes
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Synthesis of a novel chiral Schiff base of (R,R)-11,12-diamino-9,10-dihydro-9,10-ethanonanthracene and its application as ligand in Ti(IV) complex catalyzed asymmetric silylcyanation of aldehydes
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Communications - Volume 8, Issue 10, October 2007, Pages 1443–1446
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
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Any Questions? feel free to contact us