77514-26-2Relevant articles and documents
Halogenated esters useful as intermediates for insecticides
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, (2008/06/13)
The invention provides novel compounds of formula: where X represents chloro or bromo and R represents hydrogen or alkyl of up to 4 carbon atoms, processes for preparing them and their use as intermediates in the preparation of insecticidal cyclopropane derivatives. Also provided are novel compounds of formula: wherein R represents alkyl of up to 4 carbon atoms, useful as intermediates in the preparation of the compounds of formula I.
FACILE SYNTHESIS OF 3,4-DIHYDRO-4,4-DIMETHYL-2H-PYRAN-2-ONE VIA PALLADIUM CATALYZED TERMINAL OXIDATION OF 3,3-DIMETHYL-4-PENTENOATES
Tanaka, Mariko,Urata, Hisao,Fuchikami, Takamasa
, p. 3165 - 3168 (2007/10/02)
Selective terminal oxidation of 3,3-dimethyl-4-pentenoates does occur under chloride-free Wacker conditions in AcOH to give 5-acetoxy-3,3-dimethyl-4-pentenoates (7) and their analogues (2,8) in good yields.Successive cyclization of 7 and 8 at vapor phase pyrolysis on SiO2 affords 3,4-dihydro-4,4-dimethyl-2H-pyran-2-one (1).