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Merck
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  • Synthesis of new C2- symmetric fluoren-9-ylidene malonate derived bis(oxazoline) ligands and their application in Friedel-Crafts reactions.

Synthesis of new C2- symmetric fluoren-9-ylidene malonate derived bis(oxazoline) ligands and their application in Friedel-Crafts reactions.

Molecules (Basel, Switzerland) (2010-12-01)
Jing Li, Hong-Liang Chen, Lei Liu, Bin Fu
摘要

A series of new C(2)-symmetric fluoren-9-ylidene malonate-derived bis(oxazoline) ligands were synthesized from fluoren-9-ylidene malonate and enantiomerically pure amino alcohols via a convenient route. Their asymmetric catalytic properties in the Friedel-Crafts reactions of indoles with arylidene malonates were evaluated, and the Cu(OTf)2 complex of a fluoren-9-ylidene malonate-derived bis(oxazoline) bearing a phenyl group showed moderate to good enantioselectivity (up to 88% ee).

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Sigma-Aldrich
9-芴酮, 98%