64252-52-4Relevant academic research and scientific papers
Catalytic Asymmetric Formal Insertion of Aryldiazoalkanes into the C-H Bond of Aldehydes: Synthesis of Enantioenriched Acyclic α-Tertiary Aryl Ketones
Kang, Byung Chul,Nam, Dong Guk,Hwang, Geum-Sook,Ryu, Do Hyun
supporting information, p. 4810 - 4813 (2015/10/12)
A novel, catalytic enantioselective route to synthesize a variety of α-tertiary aryl ketones via a boron Lewis acid promoted formal insertion of aryldiazoalkane into the C-H bond of both aromatic and aliphatic aldehydes is described. In the presence of ch
A Novel Synthesis of Arylsulfonyl Hydrazine Derivatives Via the Reaction of Arylsulfonyl Hydrazone Salts and Hydrazonoyl Chlorides
Khalili, Gholamhossein
, p. 1882 - 1886 (2015/10/29)
An efficient method for the synthesis of arylsulfonyl hydrazines and diazo compounds via arylsulfonyl hydrazone salts is described. The reaction was performed in DMF using hydrazonoyl chlorides and sodium arylsulfonyl hydrazones, which were easily prepare
Stereoelectronic effects in diastereoselective formation of fulleroids
Kitamura, Hiroshi,Kokubo, Ken,Oshima, Takumi
, p. 4045 - 4048 (2008/02/11)
The substituent effects on diastereoselective formation of fulleroids in the reactions of C60 with various unsymmetrical diazoalkanes were investigated. The steric demand on the stereochemical course of reactions dominated the diastereoselectiv
CYCLOADDITIONS OF DISUBSTITUTED DIAZO COMPOUNDS TO P-CHLORO(BISTRIMETHYLSILYL) METHYLENE PHOSPHINE.
Thoraval, J. Y.,Nagai, W.,Yeung Lam Ko, Y. Y. C.,Carrie, R.
, p. 3859 - 3868 (2007/10/02)
Disubstituted diazo compounds rapidly add to P-chloro (bistrimethylsilyl) methylene phosphine at low temperature. 1H, 31P and 13C NMR allow the characterization of the resulting cycloadducts and the establisment of the stereochemistry of the resulting cycloadducts which are potential precursors of ?3λ5 bis methylene phosphorane by nitrogen extrusion.
Products from Reactions of Methyl (E)-2-Cyano-3-(p-substituted-phenyl)acrylates with 1-Phenyldiazoethane and Cycloreversion of Secondary Pyrazolines
Nagai, Wakatu,Hirata, Yumiko
, p. 635 - 640 (2007/10/02)
In dichloromethane, the reaction of methyl (E)-2-cyano-3-(p-substituted-phenyl)acrylates (2) with 1-phenyldiazoethane (1), prepared from 2 molar equiv of acetophenone hydrazone, produced methyl 2-cyano-4-phenyl-4-(p-substituted-phenyl)-2-pentenoates (3), 1-cyano-1-(methoxycarbonyl)-2-methyl-2-phenyl-3-(p-substituted-phenyl)cyclopropanes (4), and 4-cyano-4-(methoxycarbonyl)-3-methyl-3-phenyl-5-(1-phenyl-1-(p-substituted-phenyl)ethyl)-1-pyrazolines (5).Compounds 5 were found to be derived from compounds 3 and 1.Compounds 5 were different from the primary pyrazolines derived from compounds 1 and 2, both in mode of formation and properties.Compounds 5, when decomposed thermally or photochemically, produced the initial olefins 3.This decomposition is an example of "true" cycloreversion.
Diazoalkane Complexes of Molybdenum and Tungsten
Hillhouse, Gregory L.,Haymore, Barry L.
, p. 1537 - 1548 (2007/10/02)
Ordinary diazoalkanes, N2CHR' and N2C(CH3)R' (R' = C6H5, p-CH3C6H4), were found to react with M(CO)3(S2CNR2)2 (M = Mo, W; R = CH3, C2H5; R2 = (CH2)4) at room temperature to form stable complexes of the type M(CO)(N2CHR')(S2CNR2)2 which were conveniently isolated in good yields.Oxidaion of M(CO)(N2CHR')(S2CNR2)2 with 1 equiv of Cl2 or Br2 produced MX2(N2CHR')(S2CNR2)2 (X = Cl, Br) which were isolated as chloroform solvates.The addition of excess HBr to W(CO)(N2CHR')(S2CNMe2)2 gave a red solid which analyzed for WBr2(N2H2CHR')(S2CNMe2)2.Physical and spectroscopic data suggest that the diazoalkane ligands in the above complexes behave as terminal, singly bent, four-electron donor ligands.The NMR chemical shifts of the methine proton in N2CHR' ligands indicate that the M(S2CNR2)2 unit is strogly electron withdrawing.Syntheses for new tungsten compounds, W(CO)3(S2CNR2)2, W(CO)2(S2CNR2)2, W(CO)2(L)(S2CNR2)2 (L = p-CH3C6H4NHNH2, 4-CH3C5H4N), WBr2(S2CNR2)2, W(S2CNR2)4, and WBr3(S2CNR2)2, are also reported.
