Results 11 to 20 of about 54,719 (255)

Nylon 4,I: an amorphous polyamide [PDF]

, 1984
The melt polymerization of nylon 4, I was studied, starting with nylon-salt and nylon prepolymers (ηinh=0.25). With nylon-salt only low molecular polymers were obtained, while with prepolymers the inherent viscosity could be raised to 0.77 (3h, 270°, vac.
Gaymans, R.J., Ham, A.G.J. van der
core   +17 more sources

Design, synthesis, conformational analysis and nucleic acid hybridisation properties of thymidyl pyrrolidine-amide oligonucleotide mimics (POM) [PDF]

, 2003
Pyrrolidine-amide oligonucleotide mimics (POM) 1 were designed to be stereochemically and conformationally similar to natural nucleic acids, but with an oppositely charged, cationic backbone.
Cooper, M.A., Hickman, D.T., King, Paul M., Micklefield, J., Morral, J., Tan, T.H.S.   +5 more
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Sonogashira/N-acyliminium ion aromatic π-cyclisation processes: access to tetra- and pentacyclic lactams [PDF]

, 2008
Application of the Sonogashira reaction of N-alkynylimides with 2-iodophenol or 2-iodo-N-tosylaniline affords 2-(N-alkylimino)-benzofurans and indoles in good yield.
Grigg, R., Sridharan, V., Sykes, D.A.
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Synthesis and biological evaluation of novel PDMP analogues [PDF]

, 2006
A new series of hybrid PDMP analogues, based both on PDMP and styryl analogues of natural ceramide, has been synthesized from D-serine. The synthetic route was developed such that future introduction of different aryl groups is straightforward ...
Boldin-Adamsky, Swetlana, Busson, Roger, Futerman, Anthony H, Hillaert, Ulrik, Rozenski, Jef, Van Calenbergh, Serge   +5 more
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X=Y–ZH compounds as potential 1,3-dipoles. Part 64: Synthesis of highly substituted conformationally restricted and spiro nitropyrrolidines via Ag(I) catalysed azomethine ylide cycloadditions [PDF]

, 2008
1,3-Dipolar reactions of imines of both acyclic and cyclic α-amino esters with a range of nitroolefins using a combination of AgOAc or Ag2O with NEt3 are described.
Albert, Amornraksa, Ayerbe, Becker, Berger, Bourguignon, Bryce, Cecilia Orgaz de la Cierva, Colin Kilner, Crooks, Dondas, Díaz-Ortiz, Fejes, Fejes, Gentles, Grigg, Grigg, Grigg, Grigg, Grigg, Grigg, Grigg, Grigg, Grigg, H. Ali Dondas, Hill, Kabalka, Krapcho, Lee, Mohammed A.B. Sarker, Nielson, Norman, Nyerges, Nyerges, Nyerges, Nyerges, Nyerges, Pak, Peterli, Pinna, Poornachandran, Poornachandran, Poornachandran, Ram, Rang, Ronald Grigg, Sader-Bakaouni, Shorter, Song, Thurkauf, Vivanco, Yan   +51 more
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Pyrrolidine nucleotide analogs with a tunable conformation

Beilstein Journal of Organic Chemistry, 2014
Conformational preferences of the pyrrolidine ring in nucleotide analogs 7–14 were investigated by means of NMR and molecular modeling. The effect of the relative configuration of hydroxy and nucleobase substituents as well as the effect of the ...
Lenka Poštová Slavětínská, Dominik Rejman, Radek Pohl   +2 more
doaj   +1 more source

1-[6-Chloro-2-(phenanthren-9-yl)quinolin-4-yl]pyrrolidin-2-one

IUCrData, 2016
In the title compound, C27H19ClN2O, the quinoline system is planar, with a maximum deviation from the mean plane of 0.003 Å for the N atom. This ring makes dihedral angles of 56.64 (5) and 49.26 (2)° with phenanthrene and pyrrolidine rings, respectively.
Rajamani Raja, Subramani Kandhasamy, Uma Maheswari Narayanan, Paramasivam T. Perumal, Ramu Dhanapal   +4 more
doaj   +1 more source

Crystal structure of ethyl 1′,1′′-dimethyl-2′′,3-dioxo-3H-dispiro[benzo[b]thiophene-2,3′-pyrrolidine-2′,3′′-indoline]-4′-carboxylate

Acta Crystallographica Section E: Crystallographic Communications, 2015
In the title compound, C23H22N2O4S, the pyrrolidine ring has an envelope conformation with the spiro C atom, shared with the indoline ring system, as the flap. The mean planes of the benzothiophene and indoline ring systems are inclined to the mean plane
M. P. Savithri, M. Suresh, R. Raghunathan, R. Raja, A. SubbiahPandi   +4 more
doaj   +1 more source

Asymmetric organocatalysis of the addition of acetone to 2-nitrostyrene using N-diphenylphosphinyl-1,2-diphenylethane-1,2-diamine (PODPEN) [PDF]

, 2010
The highly enantioselective addition of acetone to 2-nitrostyrene, using N–diphenylphosphinyl-trans-1,2-diphenylethane-1,2-diamine (PODPEN) as catalyst, is ...
A. Simon Partridge, Bernardi, Burns, Charles V. Manville, Chaun, Connon, Dahlin, Daugidas T. Racys, David J. Morris, Denmark, Eder, Fletcher, García-García, Gary Woodward, Gordon Docherty, Hayashi, Hine, Hine, Huang, Ju, Kohmura, Laars, Lattanzi, Li, Liu, Liu, Martin Wills, Massi, Mei, Melchiorre, Ni, Ni, Pansare, Rishel, Seayad, Sulzer-Mosse, Suzuki, Tan, Tan, Tan, Tsandi, Tsogeova, Vijaikumar, Wang, Wang, Wang, Watson, Xu, Xu, Xu, Xu, Xue, Yu, Zhang   +53 more
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N-(Pyrrolidin-1-ylcarbothioyl)benzamide [PDF]

Acta Crystallographica Section E Structure Reports Online, 2011
In the title compound, C(12)H(14)N(2)OS, the pyrrolidine ring adopts an envelope conformation with the C atom at the 3-position as the flap and makes a dihedral angle of 65.80 (9)° with the benzene ring. In the crystal, N-H⋯O hydrogen bonds join c-glide related mol-ecules into chains extended along [001] that are further connected into (100) layers via
Al-Abbasi, Aisha A., Mohamed Tahir, Mohamed Ibrahim, Kassim, Mohammad   +2 more
openaire   +3 more sources