Process for the preparation of 5-hydroxyethylsulfonyl-2-aminophe

Details Process for the preparation of 5-hydroxyethylsulfonyl-2-aminophe Process for the preparation of 5-hydroxyethylsulfonyl-2-aminophe

1984-11-29

1986-09-23

Warren, Charles F.

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

Organic compounds

Amino nitrogen containing

564440, C07C 8511, C07C 8400

Patent

active

046137041

ABSTRACT:
Process for the preparation of 5-hydroxyethylsulfonyl-2-aminophenol (ethers) of the formula (I) ##STR1## wherein R denotes a hydrogen atom or a C.sub.1 -C.sub.4 -alkyl group and R.sub.1 denotes a hydrogen atom or an alkyl or alkoxy group with in each case 1-4 carbon atoms, which comprises condensing 5-chloro(or bromo)-2-nitrophenols, or alkyl ethers thereof, of the formula (II) ##STR2## in which R and R.sub.1 have the abovementioned meanings and X denotes a chlorine or bromine atom, with thioglycol to give 2-nitrophenol(ether) 5-hydroxyethyl-sulfides of the formula (III) ##STR3## wherein R and R.sub.1 have the abovementioned meanings, oxidizing these to give 5-hydroxyethylsulfonyl-2-nitrophenol (ethers) ##STR4## and reducing the latter to give compounds of the above formula (I).

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