22769-97-7Relevant academic research and scientific papers
Synthesis of highly substituted symmetrical 1,3-dienes via tandem carbocupration and organocuprate oxidation
Aves, Sarah J.,Pike, Kurt G.,Spring, David R.
experimental part, p. 2839 - 2842 (2011/02/22)
A 'one-pot' tandem carbocupration/organocuprate oxidation allows the formation of highly substituted symmetrical 1,3-dienes from alkynyl esters and alkyl organolithium or Grignard reagents with three C-C bonds being formed in one step. Georg Thieme Verlag
PROCESS FOR PREPARING ALKYLIDENE-SUBSTITUTED-1,4-DIONS DERIVATIVES
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Page 13-14, (2008/06/13)
A process for the preparation of a monoalkylidene substituted 1,4-dions derivatives of formula (Ia) or (Ib) or a mixture of (Ia) and (Ib): wherein: R1, R2 and R3, equal to or different from each other, are hydrogen atoms or C1-C20 hydrocarbon groups: T1 and T2, equal to or different from each other, are OR4. R4, NR42, SR4 or PR42; or T1 and T2 can be fused in an oxygen atom or a NR4 group; said process comprises the step of reacting a compound of formula (II), with a compound of formula (IIIa) or (IIIb), in the presence of at least one equivalent with respect to the compound of formula (IIIa) or (IIIb) of a salts of a base or a neutral base at a temperature higher than 70°C.
PROCESS FOR PREPARING ALKYLIDENE-SUBSTITUTED-1,4-DIONS DERIVATIVES
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Page 12-13, (2010/02/06)
A process for the preparation of a monoalkylidene substituted 1,4-dions derivatives of formula (Ia) or (Ib) or a mixture of (Ia) and (Ib): wherein: R1, R2 and R3, equal to or different from each other, are hydrogen atoms or C1-C20 hydrocarbon groups: T1 and T2, equal to or different from each other, are OR4, R4, NR42, SR4 or PR42; or T1 and T2 can be fused in an oxygen atom or a NR4 group; said process comprises the step of reacting a compound of formula (II) with a compound of formula (IIIa) or (IIIb) in the presence of at least one equivalent with respect to the compound of formula (IIIa) or (IIIb) of a carbonate of metal M or of a compound of formula MTj such as K2C03 or KHC03.
Polylithiumorganic compounds. Part 27: C,C-bond forming reactions of 3,4-dilithio-2,5-dimethyl-2,4-hexadiene
Maercker, Adalbert,Van De Flierdt, Joachim,Girreser, Ulrich
, p. 3373 - 3383 (2007/10/03)
The reaction of the title compound 3,4-dilithio-2,5-dimethyl-2,4- hexadiene (4) with various mono- and bifunctional carbon-centered electrophiles is investigated, with special emphasis on carbonyl and carbonic acid derivatives. Depending on the nature of the electrophile, mono- and disubstituted derivatives with either butadiene, allene, or alkyne skeleton are obtained. Ring forming reactions in the second derivatization step are only observed in a few cases. Electrophiles bearing halogens as leaving groups react by a different mechanism and are not suitable in C,C-bond forming reactions. The compounds obtained in this investigation are suitable and highly reactive building blocks for further modifications. (C) 2000 Elsevier Science Ltd.
Reactivity of Cumulene Complexes. Two Competing Pathways in Oxidative Solvolysis of Tetramethylbutatriene(hexacarbonyl)diiron
Kiyooka, Syun-ichi,Atagi, Takuya,Fujiyama, Ryoji,Isobe, Kiyoshi
, p. 891 - 894 (2007/10/02)
The oxidation of tetramethylbutatriene(hexacarbonyl)diiron in alcohols by ceric ammonium nitrite regioselectively gives diene-diesters and acetylene-diethers in moderate yields.The reaction is the first example showing that both the carbonylation and ethe
