In this work, we describe the asymmetric synthesis of a series of fluorinated and non-fluorinated quaternary α-amino acid derivatives. This methodology involves the diastereoselective addition of chiral 2-p-tolylsulfinyl benzylcarbanions to either imines containing a 2-furyl moiety or trifluoromethyl α-imino esters. Synthetic practicality of this method is demonstrated by short (two-steps) and convenient preparation of 2-(trifluoromethyl)indoline-2-carboxylates.
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| http://dx.doi.org/10.1007/s00726-011-0881-7 | DOI Listing |
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