Abstract:
PROBLEM TO BE SOLVED: To provide methods and compounds for the production of cyclopropyl-fused pyrrolidine-based inhibitors of dipeptidyl peptidase IV.SOLUTION: A method for the production of (αS)-α-amino-3-hydroxytricyclodecane-1-acetic acid includes asymmetric reductive amination of 3-hydroxy-α-oxotricyclodecane-1-acetic acid, performed enzymatically using a phenylalanine dehydrogenase or other amino acid dehydrogenases active with ketoacids.
Abstract:
PROBLEM TO BE SOLVED: To provide a method for producing a lactam, by which the corresponding lactam can be produced from a cycloalkane, a cycloalkanol or a cycloalkanote in one step. SOLUTION: This method for producing the lactam, comprising reacting at least one compound selected from the cycloalkane, the cycloalkanol or the cycloalkanone with ammonia and oxygen in the presence of an imide compound catalyst having an N-hydroxy(or N-oxo)cyclic imide skeleton to obtain the corresponding lactam. The imide compound catalyst includes a compound represented by formula (1) (R1 and R2 are each H, a halogen atom, an alkyl, an aryl, a cycloalkyl, or the like, or R1 R2 may be bound to each other to form a double bond, or an aromatic or non-aromatic ring; X is O or HO).
Abstract:
PURPOSE:To obtain a resin composition selected from mixture of a polyol resin having a specific molecular weight and crosslinking agent of polyisocyanate compound, mixture of acrylic resin and vinyl chloride/vinyl acetate resin and polyurethane resin and having good appearance in vacuum forming. CONSTITUTION:The composition containing at least one compound selected from a mixture of polyol resin having hydroxyl group at ends of main chain and having 1000-30000 average molecular weight and crosslinking agent of polyisocyanate having >=400 average molecular weight, mixture of acrylic resin and vinyl chloride/vinyl acetate resin and polyurethane resin as an active ingredient. Further preferably, the above mentioned composition is used together with a tacky agent layer and as necessary base film layer, etc., as a composition for color coating containing a coloring agent (e.g. pigment or dye) and organic solvent (e.g. pentane or methylethyl ketone) in addition to the above-mentioned active ingredient as essential ingredients to provide the film for vacuum forming.
Abstract:
PROBLEM TO BE SOLVED: To provide a method and a compound for producing cyclopropyl-fused pyrrolidine-based inhibitors of dipeptidyl peptidase IV.SOLUTION: A compound represented by formula M, formula M' or the like is a dipeptidyl peptidase IV inhibitor.