Method for producing peptide compound

A compound represented by the following formula (IV):

• wherein each of R1 and R2 independently represents a C1-6 alkyl group, and R3 represents an aliphatic hydrocarbon group which may have a substituent in which each of 1 to 5 methylene groups in the aliphatic hydrocarbon group may be independently replaced by a structure selected from the group consisting of —O—, —CO—, —N(R6)—, —N(R7)CO—, and —CON(R8)—, and 3 or more carbon atoms in the aliphatic hydrocarbon group are tertiary or quaternary carbon atoms, wherein each of R6, R7, and R8 independently represents a hydrogen atom or a C1-6 alkyl group,
• wherein the total number of carbon atoms in the R1R2R3Si group is 18 to 80.

A compound represented by the following formula (IV):

• wherein R1 and R2 represent a phenyl group, and R3 represents an aliphatic hydrocarbon group which may have a substituent in which each of 1 to 5 methylene groups in the aliphatic hydrocarbon group may be independently replaced by a structure selected from the group consisting of —O—, —CO—, —N(R6)—, —N(R7)CO—, and —CON(R8)—, and 3 or more carbon atoms in the aliphatic hydrocarbon group are tertiary or quaternary carbon atoms, wherein each of R6, R7, and R8 independently represents a hydrogen atom or a C1-6 alkyl group,
• wherein the total number of carbon atoms in the R1R2R3Si group is 18 to 80.

A compound represented by the following formula (IV):

• wherein each of R1 and R2 independently represents a C1-6 alkyl group or a phenyl group, and R3 represents a phenyl group in which the phenyl group is substituted with a C15-40 alkoxy group,
• wherein the total number of carbon atoms in the R1R2R3Si group is 18 to 80.

A compound represented by the following formula (V):

A compound represented by the following formula (V′):

A compound represented by the following formula (V″):

A compound represented by the following formula (V′″):