Preparation of 3-formyl-5,6-dihydro-2H-pyran

Details Preparation of 3-formyl-5,6-dihydro-2H-pyran Preparation of 3-formyl-5,6-dihydro-2H-pyran

1984-02-28

1985-07-30

Love, Ethel G.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D30900

Patent

active

045323372

ABSTRACT:
3-Formyl-5,6-dihydro-2H-pyran is prepared by conversion of acrolein in the presence of water, acids and halohydrocarbons of 1 to 6 carbon atoms and 1 to 6 halogen atoms as solvents at from 60.degree. to 150.degree. C. The 3-formyl-5,6-dihydro-2H-pyran obtained by the novel process is a valuable starting material for the preparation of dyes and crop protection agents.

REFERENCES:
patent: 2479283 (1949-08-01), Whetstone
patent: 2479284 (1949-08-01), Whetstone
patent: 2514156 (1950-07-01), Geyer et al.
patent: 2537579 (1949-08-01), Fountain et al.
patent: 3159651 (1964-12-01), Johnson et al.
C. W. Smith, Acrolein, (Heidelberg 1975).

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