... (15) Singh, R.; Whitesides, GM The Chemistry of the Thiol Group, Supplement; Patai, S., Ed.; John Wiley: London, in pw . ... (27) For reviews on reagenta for a-amidoalkylation, we: Zaugg, HE; Martin, W. B. Organic Reactions; John Wiley: New York, 1965; Vol. ... J. Org. Chem., Vol. ...