Celamerck Gmbh & Co. Kg

Shell Internationale Research Maatschappij, B.v.

Celamerck, Gesellschaft MIT Beschrankter Haftung & Co. Kg

Celarmerck Gmbh & Co. Kg

Gerhart Schneider

Rudolf Mengel

Gerbert Linden

Werner Stransky

Ludwig Schroder

Sigmund Lust

Christo A Drandarevski

Wolfgang Buck

Manfred Garrecht

Erich Raddatz

W Pfleiderer

Novel cycloalkane-5.dbd.-spiro-hydantoins of formula ##STR1## wherein A is selected from the group consisting of ##STR2## and the remaining substituents are defined below having strong, selective herbicidal activity and novel intermediates and a process for their preparation.

Herbicidal hydantoins

This invention relates to sulfonylureas of the formula ##STR1## These compounds are useful in killing weeds and in regulating the growth of cultivated plants.

Herbicidally effective sulfonylureas

Compounds of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4, R.sub.9 and R.sub.10 have diverse meanings. They are useful as herbicides.

Herbicidal imidazolinones

Compounds of the formula ##STR1## wherein R', R', R.sub.1, R.sub.2, X.sub.1, X.sub.2, Y.sub.1, Y.sub.2 and Z are variable substituents of different types. The compounds are useful as herbicides and microbicides.

2-Amino-6-(cyclopropylmethyl-amino)-pyrimidines useful as herbicides and

Compounds of the formula ##STR1## wherein R, R.sub.1, R.sub.2 and R.sub.3 are substituents of diverse types, and salts thereof. The compounds as well as their salts are useful as herbicides.

N-Pteridinyl-ureas

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Muhltal, Germany

Gerhart Schneider