Abstract: A process is provided for preparing a substituted 2,3-dihydrobenzofuran of the general formula ##STR1## in which R.sub.a is hydrogen, halogen, alkyl, straight or branched having from 1 to 4 carbon atoms, aryl, alkaryl, --OH, --OR.sub.3, --N(R.sub.d).sub.2, where R.sub.3 and R.sub.d are alkyl, straight or branched having from 1 to 4 carbon atoms; R.sub.b is alkyl, straight or branched, having from 1 to 6 carbon atoms, aryl, alkaryl; and R.sub.c is hydrogen or the same as R.sub.b, by the rearrangement of a 1,1-bis(2-hydroxybenzene) alkyl and/or aryl-ethane, in the presence of catalytic amounts of a mineral acid or organic acid such as phosphoric, sulfuric or p-toluenesulfonic, at elevated temperatures from 180.degree. to 250.degree. C., and withdrawing the resulting products from the reaction mixture as they are formed. The starting 1,1-bis(2-hydroxybenzene) alkyl and/or aryl-ethane compounds may be obtained by the catalyzed reaction of a substituted biphenol with an aldehyde.

Abstract: Process for the preparation of 2,3-dihydro-2,2-dimethyl-7-benzofuranol, comprising the reaction between catechol or 4-tert.butyl catechol and isobutyraldehyde in the presence of catalytic amounts of at least one compound selected from the group consisting of the oxides, hydroxides, alcoholates and carboxylates of metals belonging to the Groups IA, IIA, IIB and VIIB of the Periodic System of the Elements and the subsequent reaction of rearrangement of the products which have been obtained, optionally previously removing one or more low-boiling components, in the presence of a compound having acidic properties, of an organic or a mineral nature. The product is useful in the synthesis of pesticides.

Abstract: A process for the synthesis of thiocarbamic acid esters by reacting amine compounds having a general formula ##STR1## wherein A is an arylene radical, simple or substituted by halogens hydrocarbon radicals, alkoxy groups, or can be an alkylene radical having from 1 to 15 carbon atoms, straight-line or branched, simple or substituted, whereas X can be hydrogen --NH.sub.2 or can be an H.sub.2 --N--Z group in which the bivalent function Z derives from alkyl, aryl, cycloaryl, alkaryl, aralkyl radicals which can be, in their turn, simple or substituted, R and R' equal or different can be hydrogen or alkyl, aryl, alkaryl radicals and otherwise, with carbon monoxide, in the presence of a catalyst composed of a metallic selenide. The thiocarbamic acid esters are known compounds that find applications as medicaments for plants and as intermediates for organic synthesis.

Abstract: Process for the preparation of esters of carbamic acids by carbonylation of aromatic nitrocompounds, with carbon monoxide, in the presence of alcohols and of catalyst consisting of metallic selenides.