Abstract: A method of producing a polypeptide compound, wherein a peptide compound represented by formula (P) is obtained by inducing an amide formation reaction between an amino-protected lactam compound represented by formula (R1) and an amino acid ester or peptide ester compound represented by formula (R2). The definitions for the reference signs in formulae (R1), (R2), and (P) are as set forth in the claims.

Abstract: [Problem] To provide a novel means capable of generating highly stereoselective and/or highly efficient amidation reactions in a variety of substrates having a carboxyl group and an amino group, and capable of producing amide compounds. [Solution] A reaction agent for amide reactions between carboxyl groups and amino groups and including a silane compound indicated by general formula (A) and/or general formula (B). (In general formulas (A) and (B), each substituent represents the definition described in the Claims.

Abstract: Provided is a novel method whereby an amide compound can be produced by highly stereoselectively and efficiently performing amidation between a plurality of amino acids and/or peptides. A compound of general formula (3) is synthesized by forming an amide bond between the carboxyl group on the right side of general formula (1) in a compound represented thereby and the amino group on the left side of general formula (2) in a compound represented thereby, in the presence of a Lewis acid catalyst and a silylating agent [in formulae (1), (2) and (3), each symbol has the same meaning as defined in claims].

Abstract: Provided is a novel method for producing amide compounds at high stereochemical selectivities. The method according to the present invention for producing amide compounds is provided with an amidation step for reacting, in the presence of a catalyst comprising a metal compound, an amino compound with an aminoester compound represented by general formula (1) to amidate the ester group in the aminoester compound.

Abstract: Provided is a novel method whereby an amide compound can be produced by highly stereoselectively and efficiently performing amidation between a plurality of amino acids and/or peptides.

Abstract: Provided is a novel method for producing amide compounds at high stereochemical selectivities. The method according to the present invention for producing amide compounds is provided with an amidation step for reacting, in the presence of a catalyst comprising a metal compound, an amino compound with an aminoester compound represented by general formula (1) to amidate the ester group in the aminoester compound.