Physiologically active substances Patent #: 3983140
ApplicationNo. 06/088621 filed on 10/26/1979
US Classes:514/460, Chalcogen bonded directly to ring carbon of the hetero ring549/292Additional chalcogen bonded directly to the lactone ring
ExaminersPrimary: Jiles, Henry R.
Assistant: Fan, Jane T.
Attorney, Agent or Firm
International ClassesC07D 309/30 (20060101)
C07D 309/00 (20060101)
Foreign Application Priority Data1978-10-30 JP
Abstract4-Hydroxy-2-pyrone derivatives of formula (I): ##STR1## (wherein A represents an alkylene group which is optionally alkyl-substituted or an alkenylene group, and Z represents a substituted or unsubstituted aryl or aryloxy group) may be prepared by cyclizing an ester of formula (II): ##STR2## (wherein A and Z are as defined above and R represents an organic group) and have valuable antilipaemic activities.