187592-70-7Relevant articles and documents
Process for the preparation of cyclopropane carboxylic acids and intermediates therefor
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, (2008/06/13)
The compounds 3-(2,2-dichloro-3,3,3-trifluoro-1-hydroxypropyl)-2,2-dimethyl-(1R,cis)-cyclopropane carboxylic acid, cis-3-(2,2-dichloro-3,3,3-trifluoro-1-hydroxypropyl)-2,2-dimethyl-cyclopropane carboxylic acid and (1R,5S)-4-(1,1-dichloro-2,2,2-trifluoroethyl)-6,6-dimethyl-3-oxabicyclo[3.1.0]hexan-2-one occur as intermediates in a process for the preparation of insecticidally active cyclopropane carboxylate esters, said process starting from 6,6-dimethyl-4-hydroxy-3-oxabicyclo[3.1.0]hexan-2-one (Biocartol) which is reacted with the compound CF3 --CC1X2 (X=halogen) in the presence of zinc.
PRACTICAL AND STEREOCONTROLLED SYNTHESES OF BOTH (1R*,3S*)- AND (1R*,3R*)-3-(2-CHLORO-3,3,3-TRIFLUORO-1-PROPENYL)-2,2-DIMETHYLCYCLOPROPANECARBOXYLATES
Fujita, Makoto,Hiyama, Tamejiro,Kondo, Kiyosi
, p. 2139 - 2142 (2007/10/02)
The title compounds of (1R*,3S*) configuration were prepared from 3-formyl-2,2-dimethylcyclopropanecarboxylate by addition of CF3CCl2ZnCl, acetylation, and reductive β-elimination with zinc, whereas the (1R*,3R*) isomer was derived from Me2C=CHCH(OH)CCl2CF3 by diazoacetylation, Cu(II) catalyzed intramolecular cyclization, and the zinc reduction.