Patent ID: 8273830

Claim:
A method of deprotecting a protected polymer, comprising at least a step of dissolving in an organic solvent the protected polymer comprising at least a unit structure having a phenolic hydroxyl group protected with an acyl group and a deprotecting reagent selected from the group consisting of primary and secondary amine compounds each having a ClogP value of 1.00 or less with the proviso that in the secondary amine compound, neither of the two carbon atoms coupled to the nitrogen atom of the amino group is tertiary, to deprotect the protected polymer; wherein said primary amine and secondary amine compounds are represented by the formula (1): HNR 1 2-n R 2 n (1) wherein R 1 represents a hydrogen atom or a linear, branched or cyclic C 1-6 alkyl group, R 2 independently represents a linear, branched or cyclic C 2-7 alkyl group comprising at least one oxygen atom or at least one nitrogen atom, two R 2 s may be coupled to each other to form a cyclic structure comprising at least one oxygen atom and/or at least one nitrogen atom, and n stands for 1 or 2.