6682-71-9Relevant academic research and scientific papers
Electron Paramagnetic Resonance Spectra of the Radical Cations of Some Benzocyclobutenes, Benzocyclopentenes and Benzocyclohexenes
Avila, David V.,Davies, Alwyn G.,Li, Elizabeth R.,Ng, Kai M.
, p. 355 - 362 (2007/10/02)
1,2,4,5-Tetrahydrobenzodicyclobutene, 1,2,3,5,6,7-hexahydrobenzodicyclopentene and 1,2,3,4,6,7,8,9-octahydrobenzodicyclohexene, and their dimethyl derivatives, and tetramethylbenzocyclo-butene, -pentene and -hexene have been prepared.All except the first compound have been oxidised to their corresponding radical cations, and the EPR spectra have been analysed by assigning McConnell-type Q-values to the substituents in the benzene ring.It is suggested that the ordering of the orbital energy levels (ΨA above ΨS) in 3,6-dimethylbenzobiscyclobutene and -pentene is a manifestation of the Mills-Nixon effect, and results from rehybridisation of the strained molecular framework.In the radical cations of 5,10-dimethyl-1,2,3,4,6,7,8,9-octahydrobenzodicyclohexene and 5,6,7,8-tetramethyl-1,2,3,4-tetrahydrobenzocyclohexene the total unpaired electron density, as implied by the McConnell type of relationship, appears to be less than unity.Various possible causes of this are examined.
Compounds and compositions
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, (2008/06/13)
The invention concerns novel compounds of the formula I STR1 wherein: W are selected from alkyl, alkenyl and alkynyl; X are selected from halogen, nitro, cyano, alkyl, substituted alkyl, hydroxy, alkoxy, substituted alkoxy, alkenyl, alkynyl, alkenyloxy, alkynyloxy, acyloxy, alkoxycarbonyl, alkylthio, alkylsulfinyl, alkylsulfonyl, sulfamoyl, substituted sulfamoyl, amino, substituted amino, and the groups formyl and alkanoyl and the oxime and imine derivatives thereof, and an alkylene group which bridges two adjacent carbon atoms of the benzene ring; R1 is selected from hydrogen, alkyl, alkenyl, alkynyl, substituted alkyl, alkylsulfonyl, arylsulfonyl, acyl and an inorganic or organic cation; R2 is selected from alkyl, substituted alkyl, alkenyl, haloalkenyl, alkynyl and haloalkynyl; R3 is selected from alkyl, fluoroalkyl, alkenyl, alkynyl, and phenyl; p is zero or an integer selected form 1 to 4; n is zero or an integer selected from 1 to 3; and m is zero or an integer selected from 1 to 3. The compounds of the invention show cereal selective herbicidal properties and plant growth regulating properties and in further embodiments the invention provides processes for the preparation of the compounds of formula I, intermediates useful in the preparation of the compounds of formula I, compositions containing as active ingredient a compound of formula I, and herbicidal and plant growth regulating processes utilizing compounds of formula I.
FACILE SYNTHESIS OF (3aS)-1,3a-DIMETHYL-2,3,3a,5,6,7-HEXAHYDROINDEN-4(5H)-ONE, AN INTERMEDIATE FOR STEROID SYNTHESIS
Jung, Michael E.,Hatfield, Gregory L.
, p. 3175 - 3178 (2007/10/02)
The optically active Wieland-Miescher ketone 2 has been converted in six steps to the enone 9, a potentially useful synthon for optically active steroid and terpene synthesis.
NOVEL OXIDATIVE REARRANGEMENT OF β,γ-UNSATURATED KETONE HYDRAZONES ON IODINATION IN BASE
Jung, Michael E.,Hatfield, Gregory L.
, p. 3991 - 3994 (2007/10/02)
Iodination of the bicyclic enone hydrazone 3 in excess triethylamine gave, in addition to the expected vinyl iodide 4, the rearranged aromatic product 5.
