Sanofi

Morton International, Inc.

Walter Verstraeten

Marcel Descamps

Dino Nisato

Lawrence J Guilbault

Jeffrey A Ulman

Willy Verleye

Michael A Cook

An aqueous solution of sodium borohydride, sodium hydroxide, and an anionic polymer is useful for the reduction and separation of metals in wastewater and it is hydrolytically stable for a period of six months. It may also contain an alkali metal aluminate or alum. Thus, a one-package treatment of wastewater is provided by the invention described herein.

Alkali metal borohydride/anionic polymer solutions

The invention relates to new 4-hydroxyindole derivatives of general formula: ##STR1## in which R represents a labile protective group and R.sub.1 can represent hydrogen, a C.sub.1 -C.sub.6 alkyl radical, a C.sub.3 -C.sub.6 cycloalkyl radical, a lower alkoxy radical, a lower hydroxyalkyl radical, a lower (lower alkoxy) alkyl radical, a phenyl radical optionally substituted with a halogen atom or a lower alkyl or lower alkoxy radical, a cyano radical, a radical of formula ##STR2## in which R.sub.2 and R.sub.3, which may be identical or different, each represent hydrogen or a lower alkyl radical, R.sub.4 represents a hydroxy group, a lower alkyl or lower alkoxy radical or a radical ##STR3## in which R.sub.2 and R.sub.3 have the same meaning as above, R.sub.5 represents a lower alkyl radical and Alk represents a single bond or a straight- or branched-chain alkylene radical having from 1 to 4 carbon atoms. The invention also relates to a process for preparing 4-(3-amino-2-hydroxypropoxy)indole derivatives from the said 4-hydroxyindole derivatives.

4-hydroxyindole derivatives, the process for preparation thereof and

The invention relates to 4-amino-butanoic acid derivatives of general formula: ##STR1## in which: M represents an alkali metal atom,

4-Amino-butanoic acid derivatives

The invention relates to new (4S)-4-aminobutanoic acid derivatives of general formula: ##STR1## in which: R represents an N-protective group,

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Mechelen, Belgium

Walter Verstraeten