Abstract: A process for preparing dialkyl terephalate comprising the following steps:—i) providing furan-2,5-dicarboxylate; ii) esterifying the furan-2,5-dicarboxylate with alcohol to form furan-2,5-carboxylic acid dialkyl ester; iii) reacting the furan-2,5-carboxylic acid dialkyl ester with ethylene under Diels Alder conditions, elevated temperature and pressure and in the presence of a catalyst such that dialkyl terephthalate is produced; wherein the Diels-Alder reaction is free from solvent; wherein the catalyst comprises a clay comprising metal ions and having Lewis acidity.

Abstract: A process for preparing dialkyl terephalate comprising the following steps:—i) providing furan-2,5-dicarboxylate; ii) esterifying the furan-2,5-dicarboxylate with alcohol to form furan-2,5-carboxylic acid dialkyl ester; iii) reacting the furan-2,5-carboxylic acid dialkyl ester with ethylene under Diels Alder conditions, elevated temperature and pressure and in the presence of a catalyst such that dialkyl terephthalate is produced; wherein the Diels-Alder reaction is free from solvent; wherein the catalyst comprises a clay comprising metal ions and having Lewis acidity.

Abstract: The application relates to diazaphospholidine compounds of Formula 1 and Formula 2: where: A and B are independently selected from C(R22R23) and C(R22R23)C(R24R25); R1, R2, R3, R4, R18, R19, R20, R21, R22, R23, R24 and R25 each may not be present and each may be independently selected from H, halide —OH, —SO2R26 (where R26 is selected from a group as defined for R22, R23, R24 and R25), —SH, —NO2, —NH2, ═O, ═S, straight chain, branched chain, cyclic, saturated, non-saturated, substituted or non-substituted alkyl, hydroalkyl, carboalkyl, alkoxy, amino, alkenyl, aryl and —CH2 Ar (where Ar is aryl or substituted aryl), preferably containing 1 to 6 carbons, or a silane containing 1 to 6 silicon atoms, wherein, where an R1, R2, R3, R4, R18, R19, R20, R21, R22, R23, R24 and/or R25 group is not present an unsaturated bond is formed; R5 and R17 are selected from H, —NH2, —OH, halide or a substituted or non-substituted strai