1121-50-2Relevant academic research and scientific papers
Efficient Syntheses of Multisubstituted Methylenecyclopropanes via Novel Ultrasonicated Reactions of 1,1-Dihaloolefins and Metals
Xu, Linxiao,Lin, Guoying,Tao, Fenggang,Brinker, Udo H.
, p. 650 - 653 (2007/10/02)
Ultrasonicated reactions of 1,1-dihaloolefins with lithium, magnesium or sodium in the presence of alkenes rapidly afford multisubstituted methylenecyclopropanes.
Synthesis of Mono and gem-Dihalogeno-olefins from Carbonyl Compounds and in situ Generated Lithium Carbenoids
Barluenga, Jose,Fernandez-Simon, Jose L.,Concellon, Jose M.,Yus, Miguel
, p. 691 - 694 (2007/10/02)
The treatment of carbonyl compounds (5) with dihalogenomethane and lithium dicyclohexylamide at -78 deg C leads after acid hydrolysis to the crude alcohols (6), which by silylation with trimethylchlorosilane-hexamethyldisilazane-pyridine affords the crude
Chromium(II) Reduction of Trichloromethyl Carbinols and their Corresponding Ethers: One-step Synthesis of Z-Vinyl Chlorides
Wolf, Reinhard,Steckhan, Eberhard
, p. 733 - 740 (2007/10/02)
Secondary trichloromethyl carbinols and their corresponding ethers can be reduced by chemically or electrochemically generated chromium(II) chloride to form Z-monochlorovinyl compounds in one step.In the presence of a carboxy function in the α-position an E-double bond is formed.Tertiary cabinols favour the formation of dichlorovinyl compounds and rearranged carbonyl compounds.Product ratios can be altered drastically by a change in the reaction conditions; this sheds light on the reaction mechanism.
Photochemistry of Alkyl Halides. 10. Vinyl Halides and Vinylidene Dihalides
Kropp, Paul J.,McNeely, Steven A.,Davis, Robert Drummond
, p. 6907 - 6915 (2007/10/02)
The photobehavior of the acyclic vinyl iodide 2, the 1-iodocycloalkenes 11-14 and 39, the (halomethylene)cycloalkanes 45-48, and the (dihalomethylene)cyclohexanes 62-64 has been studied.Except for the dichloride 64, which exhibited only radical behavior, each of the halides afforded a mixture of ionic and radical products.The two bromides studied, 48 and 63, afforded lower ratios of ionic to radical products than the corresponding iodides 45 and 62.Irradiation of vinyl iodides was found to be a convenient and powerful method for the generation of vinyl cations, including the highly strained 1-cyclohexenyl and 1-cyclopentenyl cations and the unstabilized α-unsubstituted cations 51 and 54.The latter cations underwent rearrangement to the ring-expanded 1-cycloalkenyl cations 28 and 36, respectively.Lowering the temperature of the irradiation of iodides 13, 14, and 45 resulted in an increased ratio of ionic to radical products.However, iodide 47, which underwent principally fragmentation to enyne 61, showed little temperature effect.
Regiospecific addition of benzeneselenenyl halide to 1,1-disubstituted olefins
Ho, Pak-Tsun,Kolt, Ralph J.
, p. 663 - 666 (2007/10/02)
The reaction of benzeneselenenyl halide with a variety of 1,1-disubstituted olefins under controlled conditions yields regiospecifically the anti-Markovnikov adducts which have been converted into the synthetically yseful vinyl halides and allyl halides.
