Abstract: The present invention relates to novel 3-aryl-4-hydroxy-.DELTA..sup.3 -dihydrothiophenone derivatives of the formula (I) ##STR1## in which A, B, G, S, X, Y, Z and n have the meaning given in the description, to processes for their preparation, to novel intermediates and to the use of the compounds of the formula (I) as agents for controlling pests.

Abstract: The present invention relates to novel 2-aryl-3-hydroxy-cyclopent-2-en-1-one derivatives of the formula (I) ##STR1## in which X represents halogen, nitro, cyano, alkyl, alkoxy, alkenyloxy, alkylthio, alkylsulphinyl, alkylsulphonyl, halogenoalkyl or halogenoalkoxy,Y represents hydrogen, halogen, nitro, cyano, alkyl, alkoxy, alkenyloxy, alkylthio, alkylsulphinyl, alkylsulphonyl, halogenoalkyl or halogenoalkoxy,Z represents halogen, nitro, cyano, alkyl, alkoxy or halogenoalkoxy andA, B, D.sup.1, D.sup.2, G and n have the meaning given in the description,several processes for their preparation and their use as compositions for controlling pests and as herbicides.

Abstract: The present invention relates to novel substituted bicyclic 2-mesityl-cyclopentane-1,3-dione derivatives of the formula (I) ##STR1## in which A and Q together represent alkanediyl or alkenediyl, which is in each case optionally substituted by halogen, hydroxyl, mercapto or in each case optionally substituted alkyl, alkoxy, alkylthio, cycloalkyl, benzyloxy or aryl, and which furthermore optionally contains one of the following groups ##STR2## or is bridged by an alkanediyl group andB, B' and G have the meaning given in the description,process for their preparation and their use as agents for controlling pests, and herbicides.

Abstract: The invention relates to novel thiophene derivatives of the formula (I) ##STR1## in which X represents halogen, alkyl, alkoxy, alkylthio, halogenoalkyl, halogenoalkoxy, nitro or cyano, or two substituents X, together with the carbon atoms to which they are attached, form a saturated or unsaturated, optionally substituted ring,n represents a number from 1 to 3, andZ represents one of the groups ##STR2## in which A, B, D, G, have the meaning given in the description, to processes for their preparation and to their use as pesticides and herbicides.

Abstract: An alkylative cycloaddition method is provided that is particularly useful for the synthesis of many of the Vitamin D analogues with differing side chains. Thus, a preferred synthesis is of Vitamin D analogues having a side chain R.sub.1 where a first precursor having the structure ##STR1## with X being a halide or a pseudo halide, and a second precursor are provided, the second precursor being a 1,7 enyne. These precursors are reacted in the presence of a palladium catalyst to form compounds having the structure ##STR2## where R.sub.2 is hydrogen, hydroxyl, lower alkoxy, fluorine, or a protecting group, and R.sub.3 is hydrogen, hydroxyl, lower alkoxy, fluorine, or a protecting group.

Abstract: An alkylative cycloaddition method is provided that is particularly useful for the synthesis of many of the Vitamin D analogues with differing side chains. Thus, a preferred synthesis is of Vitamin D analogues having a side chain R.sub.1 where a substantially geometrically pure first precursor having the structure ##STR1## and a second precursor are provided, the second precursor being a 1,7 enyne. These precursors are reacted in the presence of a palladium catalyst to form compounds having the structure ##STR2## where R.sub.2 hydrogen, hydroxyl, lower alkoxy, fluorine, or a protecting group, and R.sub.3 is hydrogen, hydroxyl, lower alkoxy, fluorine, or a protecting group.