Process for making 2-aryl benz (ox, thi, imid)azoles and 2-amino

Details Process for making 2-aryl benz (ox, thi, imid)azoles and 2-amino Process for making 2-aryl benz (ox, thi, imid)azoles and 2-amino

1995-03-20

1996-10-22

Richter, Johann

Organic compounds -- part of the class 532-570 series

Organic compounds

Imidic acid halides

548224, 5483107, 548178, 564419, C07B 4302, C07D26357, C07D23518, C07D27766

Patent

active

055678432

ABSTRACT:
2-(aryl)-benz(ox, thi, imid)azoles are prepared by reacting an aromatic aldehyde with hydroxylamine to form an aromatic aldehyde oxime, halogenating the oxime to form an aromatic hydroxamoyl halide, and then reacting this halide with certain aromatic amine compounds. The products may be nitrated and then reduced to form the corresponding diamines, which are useful in making PIBX polymers.

REFERENCES:
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patent: 4831193 (1989-05-01), Lamendola et al.
patent: 4880926 (1989-11-01), Fujiwara et al.
patent: 5017280 (1991-05-01), Paris-Marcano
patent: 5223617 (1993-06-01), Hammond et al.
Dondoui, et al., Synthesis (1987), 11, 998-1001.
Tsuge, et al., Chem. Lett., (1986) 183-186.
Tsuge, et al., Bull. Chem. Soc. Jpn., (1987), 60, 2463-73.
Abdelhamid et al., "Synthesis of Fused Ring Heterocycles from Aromatic Amines with Hydroximoyl Chlorides," J. Heterocyclic Chem., 25, 1988, pp. 403-405.

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