Compound synthesis method, microarray, acid-transfer composition, and biochip composition

An acid-transfer composition comprising:

• (A) a polymer that includes a structural unit shown by a following formula (1) and a structural unit shown by a following formula (2);
• (B) a photoacid generator including a compound shown by a following formula (3);
• (C) a sensitizer including a compound shown by a following formula (4);
• and
• (D) a solvent which does not include ketone, the acid-transfer composition being used for a compound synthesis method including:
• bonding a first compound that includes an acid-labile protecting group to a substrate to form a first film;
• forming a second film on the first film using the acid-transfer composition;
• exposing the second film to remove the protecting group from the first compound under an exposed area of the second film;
• transferring an acid generated in the exposed area of the second film to the first film;
• removing the second film after being exposed;
• and
• bonding a second compound to the first compound from which the protecting group has been removed to synthesize a compound in which the first compound and the second compound are bonded,
• wherein
• R1 represents a hydrogen atom or a methyl group, and
• each of R2 and R3 independently represents a hydrogen atom, a linear or branched hydrocarbon group having 1 to 10 carbon atoms, or a cyclic hydrocarbon group having 3 to 10 carbon atoms, or
• each of R2 and R3 independently represents a hydrogen atom, a linear or branched hydrocarbon group having 1 to 10 carbon atoms, or a cyclic hydrocarbon group having 3 to 10 carbon atoms, and R2 and R3 bond to form a 3 to 10-membered monocyclic hetero ring, or bond via at least one hetero atom selected from a nitrogen atom, an oxygen atom, a sulfur atom, and a selenium atom to form a 4 to 10-membered monocyclic hetero ring,
• wherein
• R1 represents a hydrogen atom or a methyl group, and
• R2 represents a monovalent organic group,
• wherein
• each of R1 and R2 independently represents an alkyl group or a halogen atom, and
• each of n and m is independently an integer from 1 to 4.