Abstract: A process for the preparation of an oxirane of the formula ##STR1## in which Y is chlorine or phenyl,X is oxygen or CH.sub.2, andZ is hydrogen or halogen, comprising reacting dimethyl sulphide with methyl bromide in the presence of an inert organic diluent thereby to produce trimethylsulphonium bromide of the formula(CH.sub.3).sub.3 S.sup..sym. Br.sup..crclbar.and reacting the trimethylsulphonium bromide with a ketone of the formula ##STR2## in the presence of a base and in the presence of an inert organic diluent, at a temperature between about 0.degree. C. and 60.degree. C. The end products are produced in high yield and are known intermediates for known fungicides.

Abstract: A process for the preparation of oxiranes is disclosed in which a ketone of the formula ##STR1## wherein Y represents chlorine or phenyl, X represents oxygen or CH.sub.2 and Z represents hydrogen or halogen is reacted with trimethylsulphonium methyl sulphate formed by treating dimethyl sulphide with dimethyl sulphate. The process is carried out in the presence of potassium hydroxide or sodium hydroxide powder in an inert organic diluent at 0.degree. to 60.degree. C. The products are useful as intermediates for the formation of plant growth regulants and fungicides.

Abstract: A process for the preparation of oxiranes is disclosed in which trimethylsulphonium methyl sulphate, formed by treating dimethyl sulphide with dimethyl sulphate in the presence of tert.-butanol, is reacted, without previous isolation, with a ketone in the presence of a base and in the presence of tert.-butanol. The resultant oxiranes are useful in the preparation of plant growth regulants and fungicides.

Abstract: A process for the preparation of oxiranes is disclosed in which a ketone of the formula ##STR1## wherein Y represents chlorine or phenyl, X represents oxygen or CH.sub.2 and Z represents hydrogen or halogen is reacted with trimethylsulphonium methyl sulphate formed by treating dimethyl sulphide with dimethyl sulphate. The process is carried out in the presence of potassium hydroxide or sodium hydroxide powder in an inert organic diluent at 0.degree. to 60.degree. C. The products are useful as intermediates for the formation of plant growth regulants and fungicides.

Abstract: A process for the preparation of an oxirane of the formula ##STR1## in which Y represents chlorine or phenyl, X represents oxygen or Ch.sub.2 and Z represents hydrogen or halogen, which comprises containing dimethyl sulphoxide with dimethyl sulphate whereby to form trimethyloxosulphonium methyl sulphate of the formula(CH.sub.3).sub.3 SO.sup..sym. CH.sub.3 SO.sub.4.sup.63 (II)and thereafter, without isolating said trimethyloxosulphonium methyl sulphate, contacting the same with a ketone of the formula ##STR2## in which X, Y and Z have the meanings indicated above, in the presence of a base and in the presence of an inert organic diluent, at a temperature between 0.degree. C. and 60.degree. C.

Abstract: In a process for the preparation of a substituted thiadiazolyloxyacetamide of the formula ##STR1## in which R.sup.1 and R.sup.2 each independently is hydrogen, alkyl, alkenyl, alkenyl, alkinyl, optionally substituted cycloalkyl or cycloalkenyl, halogenoalkyl, alkoxyalkyl, alkoxy, aralkyl or optionally substituted aryl, orR.sup.1 and R.sup.2, together with the nitrogen atom to which they are bonded, form an optionally substituted heterocyclic structure which can contain further hetero atoms,One of X and Y is a nitrogen atom and the other a C-R.sup.3 a grouping, andR.sup.