derivatives of the tail dragger (2.2.1) heptane process for their preparation and compositions to regulators of plant growth.

摘要

The invention relates to new bicyclo(2.2.1)heptane derivatives of the general formula I IMAGE I wherein R represents a C1-12 alkyl group optionally substituted by a lower alkoxy group, a C2-4 alkenyl group or a phenyl-(lower alkyl) group optionally substituted on the phenyl ring by one or more lower alkoxy groups or halogen atoms. The invention relates further to plant growth regulating compositions comprising as active agent 0.001 to 95% by weight of a racemic and/or optically active compound of the general formula I, wherein R has the above defined meanings, along with a conventional organic or inorganic, solid and/or liquid carrier and/or filler and/or diluent and/or surfactant. The invention encompasses also the preparation of the compounds of the general formula I which comprises reacting a racemic or optically active compound of the general formula II IMAGE II wherein Y is an oxygen or sulfur atom or an oxim group, with a compund of the general formula III R - X wherein R is as defined above, and X represents a leaving group, preferably a halogen atom, a sulfonyloxy or an aminooxy group, with the proviso that when using a compound of the general formula II, in which Y is an oxim group, X is other than aminooxy group, in the presence of a basic condensing agent, and optionally resolving the racemic compound of the general formula I obtained into its optically active antipodes.