Ester compound, active agent for controlling noxious insect pest

Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing

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568594, 568667, 549421, 549475, C07C 1312

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active

056727798

ABSTRACT:
The present invention provides a compound represented by the formula: ##STR1## wherein R.sub.1 denotes a hydrogen atom or a methyl group; R.sub.2 represents a 1-methyl-2-propenyl group, a 1-methyl-2-propynyl group, a 3,3-dihalogeno-1-methyl-2-propenyl group or a C.sub.1 -C.sub.6 alkyl group which may be substituted with at least one halogen atom; and A' represents a hydrogen atom or a protecting group for a hydroxyl group. The compound is useful in the preparation of esters which can be used to control insect pests.

REFERENCES:
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Takai et al., `Effective Methods of Carbonyl Methylenation Using CH.sub.2 I.sub.2 -Zn-Me.sub.3 Al and CH.sub.2 BR.sub.2 -Zn-TiCl.sub.4 System`, Tetrahedron Letters, No. 27, pp. 2417-2420, 1978.
Greene, T.W., "Protective Groups in Organic Synthesis", pp. 50-51. 1982.

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