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Synthetic Communications
An International Journal for Rapid Communication of Synthetic Organic Chemistry
Volume 27, 1997 - Issue 18
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Original Articles

Stereoselective Synthesis of the Four Stereoisomers of 4-(N,N-Dibenzylamino)-2,2-dimethyl-3-hydroxypentanenitrile

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Pages 3227-3234 | Received 10 Apr 1997, Published online: 22 Aug 2006
 

Abstract

The title compounds 1(a,b) and 1(c,d) were synthesized by (i) non-chelation controlled sodium borohydride reduction of their corresponding α-N,N-dibenzylaminoketones and (ii) the Aldol-type condensation of optically pure N,N-dibenzylaminoaldehydes with the lithium derivative of isobutyronitrile, respectively. Attempted inversion of configurations of these secondary alcohols using the Moriarty method yielded 4-chloro-3-N,N-dibenzylaminonitrile via an aziridinium ion intermediate instead of the expected inverted alcohols.

Notes

The e.e-values were determined by 1H NMR spectroscopy using (R)-(+)-α-methoxy-α-(trifluoromethyl)phenylacetic acid (Mosher's acid) as a chiral solvating agent.

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