4-Aralkylphenols and derivatives thereof expressed by general formulas (6) and (7) are useful for producing trisphenols. ##STR00001##

A process for the manufacture of a terphenyl compound [compound (T), herein after] of formula (T): wherein each of R and R, equal to or different from each other, are selected from the group consisting of halogen, alkyl, aryl, ether, thioether, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium; each of j and k, equal to or different from each other, are zero or are an integer from 1 to 4, including the steps of (i) reacting at least one organozinc compound of formula (I) with at least one dihalocompound of formula (II) in the presence of a catalyst compound; wherein Y is selected from the group consisting of a chloride, a bromide, an iodide, an alkanesulfonate or a fluoroalkanesulfonate anion, R2 is selected from selected from the group consisting of C.sub.1-C.sub.10-alkyl, C.sub.3-C.sub.10-cycloalkyl, C.sub.1-C.sub.10-halooalkyl and C.sub.3-C.sub.10 halocyclo alkyl, each of Z, equal to or different from each other, are selected from the group consisting of a chloride, a bromide, an iodide, an alkanesulfonate or a fluoroalkanesulfonate anion; (ii) a Bayer-Villiger oxidation and (iii) hydrolysis or alcoholysis.

##STR00001##

A process for the manufacture of a terphenyl compound [compound (T), herein after] of formula (T): wherein each of R and R, equal to or different from each other, are selected from the group consisting of halogen, alkyl, aryl, ether, thioether, ester, amide, imide, alkali or alkaline earth metal sulfonate, alkyl sulfonate, alkali or alkaline earth metal phosphonate, alkyl phosphonate, amine and quaternary ammonium; each of j and k, equal to or different from each other, are zero or are an integer from 1 to 4, including the steps of (i) reacting at least one organozinc compound of formula (I) with at least one dihalocompound of formula (II) in the presence of a catalyst compound; wherein Y is selected from the group consisting of a chloride, a bromide, an iodide, an alkanesulfonate or a fluoroalkanesulfonate anion, R2 is selected from selected from the group consisting of C.sub.1-C.sub.10-alkyl, C.sub.3-C.sub.10-cycloalkyl, C.sub.1-C.sub.10-halooalkyl and C.sub.3-C.sub.10 halocyclo alkyl, each of Z, equal to or different from each other, are selected from the group consisting of a chloride, a bromide, an iodide, an alkanesulfonate or a fluoroalkanesulfonate anion; (ii) a Bayer-Villiger oxidation and (iii) hydrolysis or alcoholysis.

##STR00001##

The present disclosure relates to a monomer composition for synthesizing recycled plastic that can realize excellent color quality even though it is recovered through recycling by chemical decomposition of a polycarbonate-based resin, and allows improvement of efficiency in the recovery process, a preparation method thereof, and a recycled plastic and a molded product using the same.

Methods are provided for the synthesis of cannabinoids, including cannabidiol (CBD), cannabinol (CBN), cannabichromene (CBC), cannabidiolic acid (CBDA), cannabigerol (CBG), cannabigerolic acid (CBGA), cannabidivarin (CBDV), cannabidibutol (CBD-C4), dihydrocannabidiol (DCBD), tetrahydrocannabivarin (THCV), analogs thereof, and precursors to the foregoing. One method employs phloroglucinol or a phloroglucinol analog as a starting material. The syntheses are stereospecific, efficient, selective, and cost-effective, with little or no potential for generation of THC (()-trans-.sup.9-tetrahydro-cannabinol) or any other psychoactive side product. Telescoped syntheses are also provided, as are new cannabinoids, pharmaceutical formulations, and methods of use.

Methods are provided for the synthesis of cannabinoids, including cannabidiol (CBD), cannabinol (CBN), cannabichromene (CBC), cannabidiolic acid (CBDA), cannabigerol (CBG), cannabigerolic acid (CBGA), cannabidivarin (CBDV), cannabidibutol (CBD-C4), dihydrocannabidiol (DCBD), tetrahydrocannabivarin (THCV), analogs thereof, and precursors to the foregoing. One method employs phloroglucinol or a phloroglucinol analog as a starting material. The syntheses are stereospecific, efficient, selective, and cost-effective, with little or no potential for generation of THC (()-trans-.sup.9-tetrahydro-cannabinol) or any other psychoactive side product. Telescoped syntheses are also provided, as are new cannabinoids, pharmaceutical formulations, and methods of use.

A method for preparing a monomer composition for synthesizing recycled plastic, a monomer composition for synthesizing recycled plastic, a recycled plastic using the same, and a molded product using the same. The method includes the steps of: subjecting a polycarbonate-based resin to a depolymerization reaction; adjusting the pH of the depolymerization reaction product having a pH of 13 or more to be 8 to 12; adjusting the pH of the depolymerization reaction product whose pH is adjusted to 8 to 12 to be less than 4; and adding a crystallization solvent to the depolymerization reaction product whose pH is adjusted to less than 4 and recovering the formed aromatic diol compound crystals.

A method for preparing a monomer composition for synthesizing recycled plastic, a monomer composition for synthesizing recycled plastic, a recycled plastic using the same, and a molded product using the same. The method includes the steps of: subjecting a polycarbonate-based resin to a depolymerization reaction; adjusting the pH of the depolymerization reaction product having a pH of 13 or more to be 8 to 12; adjusting the pH of the depolymerization reaction product whose pH is adjusted to 8 to 12 to be less than 4; and adding a crystallization solvent to the depolymerization reaction product whose pH is adjusted to less than 4 and recovering the formed aromatic diol compound crystals.

A method for degrading polycarbonate includes providing a depolymerizing solvent, in which the depolymerizing solvent is phenol; adding a metal hydroxide to the depolymerizing solvent to form a mixed liquid; and adding a polycarbonate material to the mixed liquid and adding a predetermined amount of water to the mixed liquid to form a reaction liquid. An added concentration of the metal hydroxide is not less than 100 ppm, and the water content in the reaction liquid is controlled to be not greater than 10 wt %. The polycarbonate material undergoes a depolymerization reaction to form bisphenol A and carbon dioxide.

The invention is directed to a process for the preparation of an aromatic acid or a phenolic compound, said process comprising reacting a dienophile and a furanic compound comprising an acetal moiety in a Diels-Alders reaction to obtain an aromatic compound comprising said acetal moiety, followed by hydrolysis and oxidation of said acetal moiety into a hydroxide or carboxylate moiety to form the aromatic acid or phenolic compound, wherein said dienophile is selected from the group consisting of alkylenes, acetylenes, acrylates, maleates, fumarates, maleimides, propiolates, acetylene dicarboxylates, and benzynes and wherein said acetal moiety is bound directly to the 2-position of the furanic compound.