Process for preparing dihydrofuranone derivatives

Details Process for preparing dihydrofuranone derivatives Process for preparing dihydrofuranone derivatives

1991-05-03

1992-12-29

Ivy, C. Warren

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

549323, C07D30728

Patent

active

051753138

ABSTRACT:
The present invention provides a process for preparing dihydrofuranone derivative of the formula (I): ##STR1## wherein R.sup.1 and R.sup.3 are individually lower alkyl, and R.sup.2 is hydrogen or lower alkyl, by reacting a dihydrofuranone derivative of the formula(I): ##STR2## wherein R.sup.1 is as defined above, with a malonic acid derivative of the formula (II): ##STR3## wherein R.sup.2 and R.sup.3 are as defined above, in the presence of an alkalimetal alkoxide and/or an alkalimetal hydroxide.

REFERENCES:
patent: 4508731 (1985-04-01), Reibli et al.
patent: 4564629 (1986-01-01), Kunz et al.
patent: 4876359 (1989-10-01), Hasegawa et al.
DeGraw, Tetrahedron, 28, 967-972 (1972).
J. March, "Advanced Organic Chemistry", 3rd Ed., pp. 411-415 (1985).
W. Walter "Beyer/Water,-Lehrbuch der Organischen Chemie", pp. 307-308 (1984).

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