- 1,6-anhydro-β-hexopyranose derivatives and their use as herbicides and plant growth regulators
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Herbicidal and/or plant-growth regulatory compositions comprising, together with a carrier and/or surface-active agent, an effective amount of at least one herbicidal and/or plant growth regulatory active agent selected from compounds of formula (I) STR1 (in which R represents an optionally substituted aralkyl group, X represents an O--, N-- or S-linked organic group, an optionally substituted hydrocarbyl group, a halogen atom, a hydroxy, amino, alkoxyamino, nitro, cyano, azido, sulpho or phospho group, or together with the group R2e, X may represents a ketonic oxygen atom --O-- or a group of formula --CH2 O--; R1e represents a hydrogen atom or an optionally substituted hydrocarbyl group, or a formyl group; R2e represents a hydrogen atom, a hydroxy group or an optionally substituted hydrocarbyl or O-linked hydrocarbyl group, or, together with the group X, R2e may represent a ketonic oxygen atom --O-- or a group of formula --CH2 O--; R3a represents a hydrogen atom, a hydroxy group or an optionally substituted alkoxy, alkenyloxy, aralkoxy or C1-4 hydrocarbyl group; R3e represents a hydrogen atom, a hydroxy group or an optionally substituted hydrocarbyl or O-linked hydrocarbyl group; and R4e represents a hydrogen atom or an optionally substituted hydrocarbyl group) and enantiomers and salts thereof. Methods for preparing the compounds of formula (I) are described; the compositions are valuable as herbicides and/or plant-growth regulants, particularly for use with crops such as soya, rape, sugar-beet, cotton, wheat, maize and rice.
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- SYNTHESIS AND THERMAL CHEMISTRY OF ISOLEVOGLUCOSENONE
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Isolevoglucosenone (1,6-anhydro-2,3-dideoxy-β-D-glycero-hex-2-enopyranos-4-ulose, 3) has been synthesized from levoglucosenone (2) in six steps.Thus, 1,6-anhydro-4-O-benzyl-3-deoxy-β-D-erythro-hexopyranos-2-ulose, obtained by Michael addition of benzyl al
- Furneaux, Richard H.,Gainsford, Graeme J.,Shafizadeh, Fred,Stevenson, Thomas T.
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p. 113 - 128
(2007/10/02)
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