Selective nitration of phenol derivatives

Details Selective nitration of phenol derivatives Selective nitration of phenol derivatives

1997-04-09

1998-12-08

Geist, Gary

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

Organic compounds

Oxygen containing

568709, C07C20500

Patent

active

058472312

ABSTRACT:
Process for preparing 4-nitrophenol derivatives of formula (IV) with high selectivity, which comprises converting phenols to diphenyl oxalate derivatives of formula (III) and conducting nitration reaction and hydrolysis to give said 4-nitrophenol derivatives. ##STR1## In the above formulae, R is, the same or different from each other, an alkyl group having 1 to 4 carbon atoms; a halogen atom; an alkoxy group having 1 to 4 carbon atoms; a formyl group; a nitrile group; --COOR.sup.1 (R.sup.1 is an alkyl group having 1 to 4 carbon atoms); --CONR.sup.2 R.sup.3 (R.sup.2 and R.sup.3 are, the same or different from each other, hydrogen atom(s) or alkyl group(s) having 1 to 4 carbon atoms); or --COR.sup.4 (R.sup.4 is an alkyl group having 1 to 4 carbon atoms), and

REFERENCES:
patent: 5414148 (1995-05-01), Metivier et al.
Bischoff et al. Chem. Ber., 35: 3443-3450, 1902.
Arjeh Galum et. al. J. Hetj. Chem., 16:221-224, Mar. 1979.
C.A. Bischoff et al., "Uber Oxalsaurearylester," Chemische Berichte 35:3443-3452 (1902) (English language translation).

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