Zobrazeno 51 - 60
of 125
pro vyhledávání: '"35"'
Autor:
Jordan M. Sumliner, Djamaladdin G. Musaev, Bryant Chica, Tianquan Lian, Chongchao Zhao, Craig L. Hill, Elliot N. Glass, R. Brian Dyer
Publikováno v:
Journal of the American Chemical Society. 136(34)
Two MOF-like but all-inorganic polyoxometalate-based networks, [Na7X2W18Sn9Cl5O68·(H2O)m]n (1, X = Si, m = 35; 2, X = Ge, m = 41), and the molecular tetramer Na6[{Na(μ-OH2)(OH2)2}6{Sn6(B-SbW9O33)2}2]·50H2O (3) have been prepared and characterized
Autor:
Jan Vávra, Filip Teplý, Lucie Bednárová, Petr Štěpánek, Ján Tarábek, Lubomír Pospíšil, Petr Slavíček, Helena Dlouhá, Magdaléna Hromadová
Publikováno v:
Journal of the American Chemical Society. 136(31)
Two-step redox switching in enantiopure helquat system [P-1](2+) ⇌ [P-1](•+) ⇌ [P-1](0) is demonstrated. The viologen-type electroactive unit embedded directly in the helical scaffold of 1 is responsible for the prominent chiroptical switching
Publikováno v:
Journal of the American Chemical Society. 123:4653-4658
Oxy-peptide nucleic acids (OPNAs) of [-NH-CH(CH2-CH2-Base)-CH2-O-CH2-CO-]-type main chain with four different types of nucleobases (Base = A, G, C, and U) or with an abasic side group (X) were synthesized. Melting curves of the 1:1 hybrids of o(A(n))
Autor:
Alexander L. Satz, Thomas C. Bruice
Publikováno v:
Journal of the American Chemical Society. 123:2469-2477
A tripyrrole peptide-Hoechst conjugate (FPH-1) has been designed which recognizes nine dA/dT base pair A/T rich dsDNA sequences at subnanomolar concentrations and complexes its targets at near diffusion controlled rates to form a fluorescent product.
Publikováno v:
Journal of the American Chemical Society. 132:10021-10023
The preparation of tantalaziridine-hydride complex (Ar[(t)BuCH(2)]N)(2)(eta(2)-(t)Bu(H)CNAr)TaH (1) is reported (Ar = 3,5-Me(2)C(6)H(3)). While stable for months in the solid state at -35 degrees C, in solution this complex undergoes partial conversi
Autor:
David L. Tierney, Richard B. Silverman, Linda J. Roman, Pavel Martásek, Hui Huang, Brian M. Hoffman
Publikováno v:
Journal of the American Chemical Society. 122:7869-7875
We describe in detail the use of 35 GHz Mims pulsed 15N and 1,2H electron−nuclear double resonance (ENDOR) spectroscopy to study the binding of substrates and inhibitors to nitric oxide synthase (N...
Publikováno v:
Journal of the American Chemical Society. 122:1008-1014
Tryptophan indole-lyase from Escherichia coli catalyzes the reversible cleavage of l-tryptophan to indole and ammonium pyruvate. This reaction is mechanistically interesting since it involves the elimination of an aromatic carbon leaving group. We ha
Publikováno v:
Journal of the American Chemical Society. 122:619-631
A stereoselective total synthesis of natural levorotatory polycavernoside A (1) has been achieved. Initial investigations produced the properly activated disaccharide unit 18b via the conjoining of building blocks originating from l-fucose and d-xylo
Autor:
Kenneth G. Hull, Gregory K. Friestad, Makoto Iwashima, Amos B. Smith, Emmanuel Bertounesque, Jingwu Duan, Brian A. Salvatore, Joseph Barbosa, and P. Grant Spoors, Yuping Qiu
Publikováno v:
Journal of the American Chemical Society. 121:10468-10477
An asymmetric synthesis of the stereochemically fully endowed C(9−25) spiroketal fragment (+)-BC of the calyculins (1−8) is described. Highlights of the synthesis include: a highly diastereoselective IBr-induced iodocarbonate cyclization to intro
Publikováno v:
Journal of the American Chemical Society. 120:6661-6672
The steric course of the first step of Pd(0)-catalyzed allylic substitution with stabilized C-nucleophiles can be completely reversed by a suitably positioned coordinating Ph2P group, resulting in an overall inversion (1 → 4 → 5), as opposed to t