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organic compounds
In order to prepare new chiral auxiliaries useful in developing a new method of synthesis of optically pure amines or ![[beta]](/logos/entities/beta_rmgif.gif)
-amino acids, an unsymmetric derivative of pyrrolidine has been obtained, methyl 2-[(2R, 5S)-(1-benzyl-5-methoxypyrrolidin-2yl)carbonyl(S)-amino]-3-phenylpropanoate, C24H28N2O5. This has been crystallized and subjected to X-ray analysis in order to ascertain the absolute configuration of the two asymmetric C atoms of the ring. The five-membered ring is half-chair shaped. An intramolecular hydrogen bond links the amino N atom of the phenylalanine group to the carbonyl of the 5-methoxycarbonyl group.
-amino acids, an unsymmetric derivative of pyrrolidine has been obtained, methyl 2-[(2R, 5S)-(1-benzyl-5-methoxypyrrolidin-2yl)carbonyl(S)-amino]-3-phenylpropanoate, C24H28N2O5. This has been crystallized and subjected to X-ray analysis in order to ascertain the absolute configuration of the two asymmetric C atoms of the ring. The five-membered ring is half-chair shaped. An intramolecular hydrogen bond links the amino N atom of the phenylalanine group to the carbonyl of the 5-methoxycarbonyl group.
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