Method for producing polyalkylene glycol derivative having amino group at end, polymerization initiator for use in the same, and alcohol compound as raw material for the polymerization initiator

A metal salt of a silyl-protected amino group-containing alcohol compound of formula (1) or (2):

• wherein each R1 independently is a linear monovalent hydrocarbon group having 1 to 6 carbon atoms, or a branched or cyclic monovalent hydrocarbon group having 3 to 6 carbon atoms, or R1 may bind to each other to form a 3 to 6 membered ring together with a silicon atom having bonds with R1;
• R2 is a linear divalent hydrocarbon group having 1 to 6 carbon atoms, or a branched or cyclic divalent hydrocarbon group having 3 to 6 carbon atoms;
• R3 is a linear divalent hydrocarbon group having 4 to 6 carbon atoms;
• R5 is an alkylene group having 2 to 8 carbon atoms, and R5 is not the same as R2;
• M is an alkali metal;
• and
• m is an integer of 1 to 3.

A polyalkylene compound derivative having a protected amino group of formula (II-1) or (II-2):

• wherein each R1 independently is a linear monovalent hydrocarbon group having 1 to 6 carbon atoms, or a branched or cyclic monovalent hydrocarbon group having 3 to 6 carbon atoms, or R1 may bind to each other to form a 3 to 6 membered ring together with a silicon atom having bonds with R1;
• R2 is a linear divalent hydrocarbon group having 1 to 6 carbon atoms, or a branched or cyclic divalent hydrocarbon group having 3 to 6 carbon atoms;
• R3 is a linear divalent hydrocarbon group having 4 to 6 carbon atoms;
• R4 is a hydrogen atom, or a linear, branched, or cyclic hydrocarbon group that may be substituted, the hydrocarbon group having 1 to 12 carbon atoms, and the hydrocarbon group may contain a heteroatom;
• R5 is an alkylene group having 2 to 8 carbon atoms, and R5 is not the same as R2;
• m is an integer of 1 to 3;
• and
• n is an integer of 1 to 450.