Results 51 to 60 of about 3,707,282 (391)
Kinetics of Loop Formation in Polymer Chains [PDF]
, 2007 We investigate the kinetics of loop formation in flexible ideal polymer chains (Rouse model), and polymers in good and poor solvents. We show for the Rouse model, using a modification of the theory of Szabo, Schulten, and Schulten, that the time scale ...
Hyeon, Changbong +3 more
core +2 more sources
Angewandte Chemie, 2015 The formation and use of iminyl radicals in novel and divergent hydroimination and iminohydroxylation cyclization reactions has been accomplished through the design of a new class of reactive O-aryl oximes.
Jacob Davies +4 more
semanticscholar +1 more source
Hypervalent iodine-mediated cyclization of bishomoallylamides to prolinols
Beilstein Journal of Organic ChemistryA change in mechanism was observed in the hypervalent iodine-mediated cyclization of N-alkenylamides when the carbon chain between the alkene and the amide increased from two to three atoms.
Smaher E. Butt +3 more
doaj +1 more source
Investigations on the Formation of 4-Aminobicyclo[2.2.2]-octanones
Molecules, 2005 Benzylidene acetone reacts with thiocyanates derived from secondary amines in a one-pot reaction to give 4-aminobicyclo[2.2.2]octan-2-ones. The reaction mixture was investigated for the presence of possible intermediates using GC-MS.
Robert Weis +5 more
doaj +1 more source
A Generalized Theory of DNA Looping and Cyclization [PDF]
, 2009 We have developed a generalized semi-analytic approach for efficiently computing cyclization and looping $J$ factors of DNA under arbitrary binding constraints. Many biological systems involving DNA-protein interactions impose precise boundary conditions
Meiners, Jens-Christian +2 more
core +2 more sources
Geographic variation in walking activity in the red flour beetle Tribolium castaneum
Population Ecology, EarlyView.This study examined whether there is geographic variation in field populations, focusing on the moving activity in the red flour beetle Tribolium castaneum. Results showed significant differences in moving activity among field populations but no correlation with latitude or meteorological factors.
Kentarou Matsumura
wiley +1 more source
Nickel-catalyzed switchable arylative/endo-cyclization of 1,6-enynes
Nature CommunicationsCarbo- and heterocycles are frequently used as crucial scaffolds in natural products, fine chemicals, and biologically and pharmaceutically active compounds.
Wenfeng Liu +4 more
doaj +1 more source
Oxidative radical ring-opening/cyclization of cyclopropane derivatives
Beilstein Journal of Organic Chemistry, 2019 The ring-opening/cyclization of cyclopropane derivatives has drawn great attention in the past several decades. In this review, recent efforts in the development of oxidative radical ring-opening/cyclization of cyclopropane derivatives, including ...
Yu Liu +7 more
doaj +1 more source
Synthesis of Novel 3H-Quinazolin-4-ones Containing Pyrazolinone, Pyrazole and Pyrimidinone Moieties
Molecules, 2003 The diazonium salt of 3-(4-aminophenyl)-2-methyl-3H-quinazolin-4-one (2a) and its 6-bromo derivative 2b reacted with some active methylene compounds, namely ethyl acetoacetate (3), ethyl cyanoacetate (4) and acetylacetone (5), to afford the corresponding
Abdel-Basset M. Shokr +3 more
doaj +1 more source
Cyclization of Polyenes. III Cyclization of Squalene-oxides
Chemical and Pharmaceutical Bulletin, 1968 For the purpose of finding the optimum conditions of biogenetic-type synthesis of onocerin from squalene 2, 3; 22, 23-dioxide (IV), acid-catalyzed cyclization (BF3-etherate in water-saturated benzene) of squalene-2, 3-oxide (I) was investigated to afford the compounds, III, V, VI, VII, VIII and IX. The gross structure of these compounds was established
Morio Kishi +2 more
openaire +3 more sources