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The fluorous prolinol methyl ether was prepared through the perfluorohexylethylation of (S)‐1‐tert‐butyl 2‐methyl pyrrolidine‐1,2‐dicarboxylate using commercially available perfluorohexylethyl iodide, methylation, and deprotection in three steps in 19 % overall yield. In the asymmetric Michael addition reaction of nitrostyrene with propanal, the diastereoselectivity (syn/anti=92:8) with the prepared fluorous prolinol methyl ether was much higher than that (syn/anti=87–80:13–20) with nonfluorinated prolinol methyl ethers that have two n‐octyl groups or two phenyl groups in place of perfluorohexylethyl groups.
Asian Journal of Organic Chemistry – Wiley
Published: Dec 1, 2013
Keywords: ; ; ; ;
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