... Helv. Chim. Acta 2004 , 87 , 561 – 579 ; (c) Al-Sayyab , AF ; Lawson , A. ; Stevens , JO Schiff bases, part II: Some ketimines prepared by decarboxylation of α-amino-acids in the presence of ketones and their reaction and that of aldimines with phenyl isocyanate . J. Chem. Soc. ...