Isothiocyanate-Mediated Condensation of N-Acyl-α-amino Acids with Aromatic Aldehydes: One-Pot Synthesis of 1,2-Disubstituted 4-Arylmethylene-2-imidazolin-5-ones
N-Acetyl/benzoyl-amino acids (1c/1b, d) when heated with isothiocyanates (2) in the presence of suitable aromatic aldehydes (3) with pyridine as a catalyst, afford 1, 2-disubstituted 4-arylmethylene-2-imidazolin-5-ones (6).However, N-benzyloxycarbonylaminoacetic acid (1a) gives the corresponding anilide (11a).Mechanisms of these reactions are discussed.
Ashare, Ram,Mukerjee, Arya K.
p. 762 - 764
(2007/10/02)
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