Method of producing .alpha.,.beta.-unsaturated ketolactones

Details Method of producing .alpha.,.beta.-unsaturated ketolactones Method of producing .alpha.,.beta.-unsaturated ketolactones

C - Chemistry, Metallurgy

07

D

C07D 407/12 (2006.01) C07D 307/935 (2006.01) C07F 7/18 (2006.01)

Patent

CA 2064481

The present invention provides a method of preparing .alpha.,.beta.-unsaturated ketolactones which are useful in the production of prostaglandins having one or more halogen substituent(s) at position 16 or 17 in high yield, in which, a dimethyl (2-oxoalkyl) phosphonate having one or more halogen substituents (as a starting material) is reacted with a bicyclolactone aldehyde in the presence of an alkali metal hydride and a zinc compound.

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