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B. S. Thyagarajan Phillip E. Glaspy Peter Brown 《Journal of mass spectrometry : JMS》1980,15(1):22-30
The title compounds display unusual modes of fragmentation under electron impact. One of the dominant modes is the concerted elimination of the two arylthio and arylsulfonyl moieties followed by further extrusion of the C6H4 unit as a cumulene. No elimination of SO2 is observed from any of the sulfones nor an expulsion of the C4H4 fragment. Such behavior contrasts strikingly with that of 1,4-diarylsulfonyl-2-butynes and of the 1,6-diarylsulfonyl-2,4-hexadiynes. 相似文献
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Russian Chemical Bulletin - Unlike most arenes, N, N-bis(4-tert-butylphenyl)hydroxylamine reacts with Br2via the reductive bromination mechanism. Here, two hydrogens in ortho positions of benzene... 相似文献
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《Tetrahedron: Asymmetry》2005,16(3):739-743
An efficient and convenient method for the synthesis of chiral triamines with two substituents at the α position to the terminal amino group (spermidine analogues) is described. These chiral N,N-bis(4-substituted-4-aminobutyl)amines may have anticancer activities. 相似文献
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L. M. Makarenkova I. V. Bliznets S. L. Ioffe Yu. A. Strelenko V. A. Tartakovsky 《Russian Chemical Bulletin》2000,49(7):1261-1269
The reactions of primary amines withN,N-bis(trimethylsilyloxy) enamines can give products of both mono-and bis-α-oximinoalkylation of primary amines. The steric
restrictions in both reactants substantially retard bis-α-oximinoalkylation. A general method for the synthesis of α-amino-substituted
oximes from primary amines and bis-silyl derivatives of aliphatic nitro compounds was developed.
For Part 1, see Ref. 1.
Published inIzvestiya Akademii Nauk, Seriya Khimicheskaya, No. 7, pp. 1265–1272, July, 2000. 相似文献
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O-Halogenosilyl-N,N-bis(trimethylsilyl)hydroxylamines – Synthesis, Crystal Structure, and Reactions The substitution of halogenosilanes on lithiated N,O-bis(trimethylsilyl)-hydroxylamine in the molar ratio of 1 : 1 occurs on the oxygen atom. The O-halogenosilyl-N,N-bis(trimethylsilyl)hydroxylamines were prepared: RSiF2ON · (SiMe3)2 (R = CMe3 1 , CHMe2 2 , CH2C6H5 3 , C6H2(CMe3)3 4 ), RR′SiFON(SiMe3)2 (R = CMe3, R′ = C6H5 5 ; R = Me, R′ = C6H5 6 ; R = C6H2Me3, R′ = C6H2Me3 7 ; R = CH2C6H5, R′ = CH2C6H5 8 ; R = CHMe2, R′ = CHMe2 9 ; R = CMe3, R′ = CMe3 10 ), RSiCl2ON(SiMe3)2 (R = CMe3 11 ; R = Cl 12 ). The reaction of fluorosilanes with lithiated N,O-bis(trimethylsilyl)hydroxylamine in the molar ratio of 1 : 2 leads to the formation of O,O′-fluorosilyl-bis[N,N-bis(trimethylsilyl)hydroxylamines]: RSiF[ON(SiMe3)2]2 (R = CMe3 13 ; R = C6H5 14 ). 13 could be prepared in the reaction of 1 with LiON(SiMe3)2. Lithiated dimethylketonoxime reacts with 1 to Me2C=NOSiRF–ON(SiMe3)2 [R = CMe3 ( 15 )]. The first crystal structure of a tris(silyl)hydroxylamine ( 4 ) is shown. The angle at the nitrogen prove a pyramidal geometry. 相似文献
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On the dipole moments and first-order hyperpolarizability of N,N-bis(4-bromobutyl)-4-nitrobenzenamine 总被引:1,自引:0,他引:1
Kishore VC Dhanya R Sreekumar K Joseph R Kartha CS 《Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy》2008,70(5):1227-1230
The nonlinear optical molecule N,N-bis(4-bromobutyl)-4-nitrobenzenamine was synthesized. The ground state dipole moment was determined by the Debye-Guggenheim method. A solvent mixture of acetonitrile and toluene was used for the solvatochromic determination of the excited state dipole moment. Excited state has a high value for the dipole moment which indicated a higher degree of charge transfer from the donor to the acceptor moiety on excitation by light. The first hyperpolarizability (beta(ijk)) of the molecule was evaluated assuming the two level model of the first hyperpolarizability. 相似文献
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Reaction of N, N-bis(2-chloroethyl)amine hydrochloride with chloroanhydrides of carboxylic acids of the furan series, in chloroform in the presence of pyridine gives N, N-bis(2-chloroethyl)amides of furan carboxylic acid, furylacrylic acid, 5-nitrofuran carboxylic acid, and 5-nitrofurylacrylic acid.N, N-bis(2-chloroethyl)hydrazides of furan carboxylic acid, furyl carboxylic acid, 5-nitrofuran carboxylic acid, and 5-nitrofurylacrylic acid were obtained in 78–88% yields by reacting N, N-bis(2-chloroethyl)hydrazine hydrochloride with the chloroanhydrides of the appropriate acids in chloroform in the presence of pyridine. The last two hydrazides were prepared in 31 % and 56 % yield, respectively, using anhydrous sodium acetate in place of pyridine. 相似文献
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Tishkov AA Dilman AD Faustov VI Birukov AA Lysenko KS Belyakov PA Ioffe SL Strelenko YA Antipin MY 《Journal of the American Chemical Society》2002,124(38):11358-11367
The structure and stereodynamics of N,N-bis(silyloxy)enamines (1), a new class of enamines with extraordinary reactivity, have been simulated by the DFT PBE/TZP method. The computed pattern of dynamic behavior and structural peculiarities of 1 was shown to reflect adequately the results of the studies by a series of physical methods including X-ray analysis and dynamic NMR and UV spectroscopies, which provided evidence of a rather low barrier for rotation around the C,N single bond, a negligible contribution of the n-pi-conjugation, a high barrier of inversion, and high pyramidality of the nitrogen atom. 相似文献