Zobrazeno 51 - 60
of 322
pro vyhledávání: '"35"'
Publikováno v:
Journal of the American Chemical Society. 143:7306-7313
A Co-catalyzed highly regio- and enantioselective reductive coupling of alkynes and aldehydes has been developed under visible light photoredox dual catalysis. A variety of enantioenriched allylic alcohols have been obtained by using unsymmetrical in
Publikováno v:
Journal of the American Chemical Society. 120:7260-7270
Photolysis of trans-[(cyclam)MnIII(N3)2](ClO4) (1) in methanol at −35 °C with ∼350 nm light produces blue [{trans-[(cyclam)MnV(N)]}2(μ-N3)](ClO4)3·3H2O (2) and dinitrogen (cyclam = 1,4,8,11-tetraazacyclotetradecane). A series of six-coordinate
Autor:
John C. Linehan, and Thomas E. Bitterwolf, J. Timothy Bays, Clement R. Yonker, Scott L. Wallen
Publikováno v:
Journal of the American Chemical Society. 119:10170-10177
The in situ photolytic exchange of ethylene and hydrogen for carbon monoxide on cymantrene (CpMn(CO)3 , Cp = η5-cyclopentadienyl) and methylcymantrene (MeCpMn(CO)3, MeCp = monomethyl-η5-cyclopentadienyl) dissolved in subcritical and supercritical s
Autor:
K. Kasdorf, Anthony G. M. Barrett
Publikováno v:
Journal of the American Chemical Society. 118:11030-11037
Quatercyclopropane 31 was oxidized, homologated, reduced, and monocyclopropanated to provide the pentacyclopropane alcohol 35. Subsequent deoxygenation of alcohol 35 was effected using N-(phenylthio)succinimide (24) and tributylphosphine followed by
Autor:
Harry C. Dorn, Rong Huang, Steven Stevenson, Katelyn R. Tepper, Hannah M. Franklin, Kevin Cover, Xiaoyang Liu, Narasimhamurthy Shanaiah, Ryan M. Koenig, Diego Troya, Xiaoling Wang, D. Mathew Sublett, Xu Feng, Tiffany L. Seeler, Robert J. Bodnar
Publikováno v:
Journal of the American Chemical Society. 143:4593-4599
Although fullerenes were discovered nearly 35 years ago, scientists still struggle to isolate "single molecule" tubular fullerenes larger than C90. In similar fashion, there is a paucity of reports for pristine single-walled carbon nanotubes (SWNTs).
Publikováno v:
Journal of the American Chemical Society. 115:11906-11917
The MM3 force field has been extended to cover aromatic heterocycles of the pyridine and pyrrole types. Structures (32 compounds), heats of formation (35 compounds), dipole moments (35 compounds), and vibrational spectra (11 compounds) have been exam
Autor:
Dominique Florentin, Michel Azoulay, Jean-Claude Tabet, Georges Guillerm, François Frappier, Andrée Marquet
Publikováno v:
Journal of the American Chemical Society. 115:2139-2145
Previous results led to the conclusion that the last step of biotin biosynthesis, the sulfuur insertion into dethiobiotin should involve a thiol as intermediate. The three possible thiols have been synthesized and their biological activity was evalua
Publikováno v:
Journal of the American Chemical Society. 115:989-994
Changes in quadrupole relaxation rates of 23 Na on addition of the Cl - salts of Na + , K + , Rb + Cs + , TMA + , and TEA + ions were used to determine the relative affinities of these cation for micells composed of the decyl phosphate monoanion, DPH
Publikováno v:
Journal of the American Chemical Society. 114:8177-8180
The hydrogen-bonded dimer CH 3 NC...HCl has been isolated in a pulsed jet by keeping the reactive components CH 3 NC and HCl separate until the point at which they expand into the evacuated Fabry-Perot cavity of a pulsed nozzle Fourier-transform micr
Publikováno v:
Journal of the American Chemical Society. 113:7613-7630
A convergent asymmetric synthesis of the polyether antibiotic ferensimycin B has been completed. Chiral enolate bond constructions were employed to establish seven of the 16 stereocenters of the subunits 35 and 52, which comprise the C& and CI&3 port