摘要:
The synthesis of a range of 3-(phenylsulfonimidoyl)propanoate derivatives is described. A number of strategies for the imination of the key sulfoxide methyl 3-(penylsulfinyl)propanoate are discussed including the use of O-(mesitylsulfonyl)hydroxylamine (MSH) and iminoiodane reagents (Ph-I=N-SO2R). A successful strategy for the preparation of the target compounds was the use of MSH followed by in situ coupling with a NBoc-protected amino acid. The pseudo-dipeptides thus formed exhibited interesting conformational properties in CDCl3 Solution giving evidence of intramolecular H-bonds in all cases, except for the proline derivative.