55136-87-3Relevant academic research and scientific papers
RADICAL POLYMERIZATION INITIATOR AND METHOD FOR PRODUCING POLYMERS
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Paragraph 0152-0156, (2016/10/31)
The present invention involves a radical polymerization initiator comprising an organotellurium compound represented by a formula (1), wherein R1 represents an alkyl group or the like, each of R2 and R3 independently represents a hydrogen atom or the like, and each of R4, R5, and R6 independently represents a hydrogen atom or the like. The present invention provides: a radical polymerization initiator that is useful for producing a polymer that includes a double bond at the molecular terminal; and a method for producing a polymer that utilizes the radical polymerization initiator.
Experimental and theoretical studies on formal σ-bond metathesis of silyl tellurides with alkyl halides
Yamago, Shigeru,Iida, Kazunori,Yoshida, Jun-ichi
, p. 664 - 670 (2008/02/06)
Silyl tellurides reacted with alkyl halides under mild thermal conditions to give the corresponding alkyl tellurides and silylhalides in good to excellent yields. Substitution took place much faster in polar solvents, such as acetonitrile, than that in no
Transformation of β-chalcogeno alkenylboranes into tetrasubstituted olefins
Gerard, Julien,Hevesi, László
, p. 367 - 381 (2007/10/03)
In view of generating trisubstituted vinylic chalcogen derivatives, β-chalcogeno alkenylboranes generated through the chalcogen electrophile induced rearrangements of 1-alkynyltrialkyl borates have been subjected to Suzuki-Miyaura coupling and to boron to copper transmetalation followed by alkylation. Some of the trisubstituted vinyl sulfides obtained by this latter strategy have been converted efficiently into the title olefins through the NiCl2(dmpe) catalyzed coupling with various Grignard reagents.
A new, practical synthesis of organotellurium compounds from organic halides and silyl tellurides. Remarkable effects of polar solvents and leaving groups
Yamago, Shigeru,Iida, Kazunori,Yoshida, Jun-ichi
, p. 5061 - 5064 (2007/10/03)
Silyl tellurides react with organic halides to give the corresponding organotellurium compounds and silyl halides in good to excellent yields. Substitution proceeds in polar solvents, such as acetonitrile, but not in nonpolar solvents under identical conditions. The leaving group also plays a significant role, with alkyl bromides being the most reactive, alkyl chlorides less so and alkyl iodides the least reactive. After removal of the volatile silyl halides and solvent under vacuum, the essentially pure organotellurium compounds, which can be used directly as precursors for carbocations, carbanions, and carbon-centered radicals, were obtained.
Isomerization processes in the synthesis of asymmetric allyl chalcogenides
Deryagina,Korchevin
, p. 223 - 225 (2007/10/03)
Allyl-propenyl rearrangement (prototropic isomerization) occurs in the synthesis of allyl organyl chalcogenides in a hydrazine hydrate - KOH system with a 6 - 10-fold molar excess of KOH. Specificities of the rearrangement that depend on the nature of the chalcogen were studied.
REACTIVITY OF ALLYLIC AND VINYLIC SILANES, GERMANES, STANNANES AND PLUMBANES TOWARD SH2' OR SH2 SUBSTITUTION BY CARBON- OR HETEROATOM-CENTERED FREE RADICALS
Light, James P.,Ridenour, Michael,Beard, Lois,Hershberger, James W.
, p. 17 - 24 (2007/10/02)
Compounds of the type CH2=CHCH2MR3 and (E)-PhCH=CHMR3 (M = Si, Ge, Sn, Pb) were allowed to react with a series of heteroatom-centered radicals (PhY*, Y = S, Se, Te, derived from PhYYPh) and carbon-centered radicals ((CH3)2CH* derived from (CH3)2CHHgCl).We report that alkenylplumbanes and, under forcing conditions, alkenylgermanes undergo SH2 or SH2' substitution of the metal by chain mechanism analogous to those previously reported for alkenylstannanes.Alkenylsilanes are unreactive.Based solely upon product yields, the following trends were observed: The reactivity of the alkenylmetals follow the order metal = Pb > Sn > Ge (> Si).The allylmetals were more reactive then the β-metallostyrenes toward the reactants employed in this study.The chalcogen series PhYYPh exhibits the reactivity order Y = S > Se > Te.
ALLYLIC ALCOHOLS FORMATION BY OXIDATION OF ALLYLIC PHENYL TELLURIDES. A POSSIBLE SIGMATROPIC REARRANGEMENT OF ALLYLIC TELLUROXIDES
Uemura, Sakae,Fukuzawa, Shin-ichi,Ohe, Kouichi
, p. 921 - 924 (2007/10/02)
Treatment of cinnamyl, 3-methyl-2-butenyl, and 2-cyclohexenyl phenyl tellurides with an oxidizing agent such as H2O2, NaIO4, or t-BuOOH at room temperature under nitrogen affords 1-phenyl-2-propenol, 2-methyl-3-butene-2-ol, and 2-cyclohexenol as a sole or main product respectively in a high yield.The formation of these allylic alcohols can be best explained by assuming a -sigmatropic rearrangement of the intermediate allylic telluroxides.These tellurides also react with oxygen, the formation of α,β-unsaturated carbonyl compounds being much increased in this oxidation.
ALKALINE HYDROLYSIS OF DIARYL DITELLURIDES UNDER PHASE TRANSFER CONDITIONS; SYNTHESIS OF ALKYL ARYL TELLURIDES
Comasseto, J. V.,Ferreira, J. T. B.,Val, Fontanillas
, p. 261 - 266 (2007/10/02)
The disproportionation reaction of diaryl ditellurides with sodium hydroxide under phase transfer conditions at room temperature is described for the first time.The phase transfer catalyst used is 2HT-75, a trade name for a mixture of dialkyldimethylammonium chlorides.The intermediates aryl tellurolates react "in situ" with alkyl halides to give the corresponding alkyl aryl tellurides (ArTeR) in 52-72percent yield.The following compounds were prepared: Ar = C6H5, R = CH3(CH2)3CH2,(CH3)2CHCH2CH2, (CH3)2CHCH2, CH3CHBrCH2CH2, CH3(CH2)8CH2, C6H5CH2, ClCH2, C6H5CH2CH2, CH2=CHCH2, C6H5CH=CHCH2, C6H5SeCH2, ; Ar = p-CH3C6H4, R = CH3(CH2)2CH2; Ar = p-CH3OC6H4, R = CH3(CH2)2CH2; Ar = p-C2H5OC6H4, R = CH3(CH2)2CH2; Ar = 2-naphthyl, R = CH3(CH2)2CH2.
