Xanthene protective agent

Abstract

To develop a protecting group that facilitates separation and purification, after reaction, of a compound including a protected functional group, without solidifying or insolubilizing the compound. A xanthene compound of by General Formula (1) (wherein Y is —OR17 (R17 is a hydrogen atom or an active ester-protecting group), —NHR18 (R18 is a hydrogen atom, or a linear or branched C1-C6 alkyl group or aralkyl group), an azide, a halogen atom, or a carbonyl group formed together with a methylene group; at least one of R1 to R8 is represented by Formula (2); —O—R9—X-A  (2) and a residue is a hydrogen atom, a halogen atom, a C1-C4 alkyl group, or a C1-C4 alkoxy group, wherein R9 is a linear or branched C1-C16 alkylene group; X is O or CONR19 (R19 is a hydrogen atom or a C1-C4 alkyl group); and A is represented by Formula (3) or the like (wherein R10, R11, and R12, the same or different, are a linear or branched C1-C6 alkyl group or an aryl group optionally including a substituent; R13 is a single bond or a linear or branched C1-C3 alkylene group; and R14, R15, and R16 are a linear or branched C1-C3 alkylene group)).

Dependencies are inferred from the claim text.