Patent ID: 6802874
Filing Date: 2004-10-12
Classification: C07C,C10L,C10M

Abstract:
A process for making a linear compound comprising:reacting together, in an organic solvent, and in the presence of a basic catalyst, compounds of the formulas (Ia) and (IIa) with an aldehyde represented by the formula O&boxH;CHR6, and optionally sulphur; wherein R0 is hydrogen or a hydrocarbyl group; R5 is hydrogen or a hydrocarbyl group; j is 1 or 2; R3 is hydrogen, a hydrocarbyl or a hetero-substituted hydrocarbyl group; either R1 is hydroxyl and R2 and R4 are independently either hydrogen, hydrocarbyl or hetero-substituted hydrocarbyl or R2 and R4 are hydroxyl and R1 is either hydrogen, hydrocarbyl or hetero-substituted hydrocarbyl; R6 is hydrogen or a hydrocarbyl group; the process including an oligomerization step wherein the compound corresponding to formula (IIa) is permitted to react prior to the addition of the compound corresponding to formula (Ia); the organic solvent comprising up to about 48% by weight of the reaction mixture; the number of molar units of the compound represented by formula (Ia) being m, the number of molar units of the compound represented by formula (IIa) being n, wherein m is at least 1; n is at least 2; the ratio of m to n ranging from 0.1:1 to 2:1.