Abstract: A process for the preparation of a polycyclic dye of Formula (1) which comprises steps: i) reaction of a compound of formula (2) with a compound of formula (3) or a derivative thereof to form an intermediate of formula (4) and ii) reaction of the intermediate of formula (4) with an aromatic compound of formula (5): B--H optionally in the presence of an oxidizing agent, wherein: A and B each independently is optionally substituted aryl; and X.sup.1 and X.sup.2 each independently is --H, halo, alkyl, or alkoxy.

Abstract: Benzodifurantriones of Formula (1): ##STR1## in which W is unsubstituted or substituted aryl, a process for their preparation via dioxo intermediates and processes for their conversion into benzodifuranone dyes and compounds of Formula (7): ##STR2## are provided wherein R.sup.3 is --H, --COR.sup.2, --SO.sub.2 R.sup.2 -- which R.sup.2 is alkyl, cycloalkyl, aryl or aralkyl and R.sup.4 is --COOR.sup.2, --CONRR.sup.1 in which R and R.sup.1 each independently is --H, alkyl, cycloalkyl, aryl or aralkyl; --COOH or the alkali metal, alkaline earth metal or ammonium salts thereof; or --COX.sup.2 -- which X.sup.2 is halo.

Abstract: Described herein is a process for preparing a polycyclic dye which comprises reacting a compound of the Formula (2): ##STR1## with a compound of the formula: ##STR2## wherein X and X.sup.1 are, for example, hydrogen or halogen, X.sup.2 and X.sup.3 are halogen and Z is --CN, --CO.sub.2 R or --CONR.sup.1 R.sup.2 where R, R.sup.1 and R.sup.2 are, for example, alkyl. Processes for making compounds of Formulas (3) and (4) are also disclosed.

Abstract: A process for the preparation of cyclopropane compounds which comprises reacting a compound of formula:Y--CH.sub.2 --CNwith a diene of formula:CX.sub.2 =CH--CH=C(CH.sub.3).sub.2in the presence of at least one reducible copper salt, X being chlorine or bromine and Y being cyano, alkoxycarbonyl containing up to four carbon atoms in the alkoxy moiety, benzyloxycarbonyl, phenoxybenzyloxycarbonyl or 2,2-dichlorovinyloxybenzyloxycarbonyl.

Abstract: Isobutene is oxidatively coupled with vinylidene chloride by heating in the presence of palladium acetate, to give 1,1-dichloro-4-methylpenta-1,3-diene. This compound is useful as an intermediate in the production of insecticides. Any 1,1-dichloro-4-methylpenta-1,4-diene also produced is thermally isomerized to the 1,3 product.