Title:
MANUFACTURE OF 3,4-DIHYDRO-ALPHA-PYRON, LACTONE AND SUBSTITUTED LACTONE AND THEIR MANUFACTURE
Document Type and Number:
Japanese Patent JPS5877875
Kind Code:
A
Abstract:
1. Process for the production of 3,4-dihydro-alpha-pyrones of the formula see diagramm : EP0075680,P5,F18 wherein R**1 , R**2 and R**3 can be the same or different and stand for hydrogen or alkyl groups with 1 to 10 C-atoms, characterised in that a compound of the formula see diagramm : EP0075680,P5,F4 wherein R**1 , R**2 and R**3 have the aforementioned meaning and R**4 denotes the residues see diagramm : EP0075680,P5,F6 see diagramm : EP0075680,P5,F7 see diagramm : EP0075680,P5,F8 or -O-R**5 wherein R**5 stands for lower alkyl groups, is heated.
Inventors:
HANSUUGEORUKU SHIYUMITSUTO
Application Number:
JP16991182A
Publication Date:
May 11, 1983
Filing Date:
September 30, 1982
Export Citation:
Assignee:
DYNAMIT NOBEL AG
International Classes:
B01J21/00; C07B61/00; C07D307/32; C07D307/33; C07D309/32; C07D315/00; (IPC1-7): B01J21/16; B01J29/06; C07D307/32; C07D309/32
Attorney, Agent or Firm:
Toshio Yano