Ratio of 1,3- and 1,5-dialkyl-substituted pyrazoles obtained from chlorovinyl alkyl ketones and alkylhydrazines, 3(5)-pyrazoles and alkyl bromides
Unsymmetrically substituted 1,3- and 1,5-dialkylpyrazoles and 1,3-dialkyl-5-chloropyrazoles were prepared. 2-Chlorovinyl ketones react with C1-C8-alkylhydrazines along two routes giving mixtures of 1-R′-3-R- and 1-R′-5-R-pyrazoles wi
Popov,Rudyakova,Larina,Kobelevskaya,Levkovskaya
p. 1650 - 1662
(2015/02/02)
3-Alkenyl-5-chloropyrazoles: Expedient synthesis via heterocyclization of 1,1-dichloro-4-halo-1-alken-3-ones with hydrazines
Synthesis of hard-to-reach 5-chloro-3-alkenylpyrazoles was developed via heterocyclization of alkyl-, benzyl-or dialkylhydrazines with 1,1-dichloro-4-halo-1-alken-3-ones obtained from haloacyl chlorides and vinylidene chloride. The reaction process includ
Levkovskaya, Galina G.,Kobelevskaya, Valentina A.,Rudyakova, Elena V.,Ha, Khanh Q.,Samultsev, Dmitrii O.,Rozentsveig, Igor B.
experimental part
p. 1844 - 1851
(2011/04/16)
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