Chinoin Gyogyszer Es Vegyeszeti Termekek Gyara Rt.

Gyorgy Csermely

Sandor Szoke

Gyorgy Lugosi

Maria Bakonyi

Jeno Ghyczy

Attila Molnar

Tibor Zsolnai

Gyorgy Lanyi

Istvan Szepessy

Anionic surface active agents of the general formulae I and II ##STR1## where R.sup.1 is C.sub.1-12 alkyl;

Anionic surface active agents

The invention concerns a new process for the preparation of biologically active 2-[(alkoxycarbonyl)amino]-5-(alkylthio)-1H-benzimidazoles of the general formula (V) ##STR1## wherein R and R.sup.1 independently stand for alkyl having 1 to 3 carbon atoms.

Process for preparing alkylthiobenzimidazoles

This invention relates to a process for the preparation of aluminum alloys having a high reducing capacity for use in reductions in organic chemistry. According to this method a discontinuous heterodisperse superficial alloy is formed by subjecting an aluminum alloy prepared by a metallurgical process to superficial activation and/or treating aluminum with a salt of a metal having a greater normal electrode potential than that of aluminum; whereby the solution of said metal in a protic solvent is reacted with granular aluminum and/or an aluminum alloy. The catalyst prepared according to the invention is especially suitable for the reduction of a nitro or nitroso group into an amino group. The aluminum alloys having a high reducing capacity are also within the scope of the invention.

Aluminum alloys having a high reducing capacity and preparation thereof

Compounds of the formula, ##SPC1## Wherein R.sup.1 and R.sup.2 each stand for hydrogen or a group of the general

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Budapest, Hungary

Gyorgy Csermely