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    • 1. 发明专利
    • QUINAZOLINONE DERIVATIVE
    • JPH10158249A
    • 1998-06-16
    • JP31634796
    • 1996-11-27
    • OTSUKA PHARMA FACTORY INC
    • KAWAMURA KENICHIKUROKI YASUHISA
    • C07D239/90A61K31/505A61K31/517A61K31/535A61P3/08A61P3/10
    • PROBLEM TO BE SOLVED: To obtain the subject new compound useful as medicines, especially a hypoglycemic agent for preventing and treating diabetes. SOLUTION: A compound of formula I (R is a lower alkyl; R is a halogen; R is a lower alkyl, a lower alkoxy, etc.; X is a lower alkylene; Y is S, sulfinyl, etc.,), e.g. 3-[7-chloro-3-methyl-4(3H)-quinazolinon-2-yl]propionic acid. The compound of formula I is produced by reacting a compound of formula II with a compound of formula III (R is a lower alkoxy; Z is a halogen) in an amount of the same mole or larger mole at or than that of the compound of formula II in the presence of an excessive amount of an acidremoving agent such as pyridine at 0 deg.C to a room temperature for approximately 0.5-50hr and subsequently subjecting the obtained compound of formula IV to a cyclization reaction with a trialkylsilane halide in the presence of a base in an inert solvent. The base and the trialkylsilane halide are used in amounts of generally 1 equivalent to excessive equivalent, preferably approximately 3-20 equivalent, respectively. The reaction is carried out usually at 0-100 deg.C for approximately 0.5-20hr.