Results 41 to 50 of about 23,086 (229)
Generalized "Quasi-classical" Ground State for an Interacting Two Level System
, 2004 We treat a system (a molecule or a solid) in which electrons are coupled linearly to any number and type of harmonic oscillators and which is further subject to external forces of arbitrary symmetry.
Asher Yahalom +16 more
core +1 more source
Synthetic studies towards d-modified paclitaxel analogues [PDF]
Journal of the Serbian Chemical Society, 2012 A synthetic sequence has been developed for the preparation of 9,10-O-diacetyl-4-desmethylene-4β-(3-butenyl)-4α-hydroxy-5-O-mesyltaxicin I-1,2-carbonate 3, an intermediate in the attempted synthesis of cyclobutane paclitaxel analogue.
Matović Radomir +2 more
doaj +1 more source
Sensitivity of Antarctic Urospora penicilliformis (Ulotrichales, Chlorophyta) to ultraviolet radiation is life stage dependent [PDF]
, 2009 The sensitivity of different life stages of the eulittoral green alga Urospora penicilliformis (Roth) Aresch. to ultraviolet radiation (UVR) was examinedin the laboratory.
Campana, G. +5 more
core +1 more source
Photolyzable Polymer Brushes: Subtractive 3D Structuring of Surfaces Using Water and Light
Angewandte Chemie International Edition, EarlyView.Facile structuring of polymer brushes is achieved by flipping the process from controlled growth to controlled brush photolysis. Using surface‐initiated radical ring‐opening polymerization of cyclic monomers with photocleavable cyclobutane rings, photodegradable targets are embedded into the polymer chains. The enabled continuous subtractive patterning
Henrik Kalmer +11 more
wiley +1 more source
A biorenewable cyclobutane-containing building block synthesized from sorbic acid using photoenergy
iScience, 2022 Summary: A novel cyclobutane-containing diacid building block, CBDA-3, was synthesized from sorbic acid using clean, efficient [2 + 2] photocycloaddition.
Micah Mabin +4 more
doaj +1 more source
Possibility of [1,5] sigmatropic shifts in bicyclo[4.2.0]octa-2,4-dienes [PDF]
, 2015 The thermal equilibration of the methyl esters of endiandric acids D and E was subject to a computational study. An electrocyclic pathway via an electrocyclic ring opening followed by a ring flip and a subsequent electrocyclization proposed by Nicolaou ...
Catak, Saron +7 more
core +2 more sources
Chemistry – A European Journal, EarlyView.The synthesis of 2‐methyl propellane and its conversion to various 1,2‐ and 1,2,3‐di‐ and trisubstituted bicyclopentanes is reported. Abstract Bicyclo[1.1.1]pentanes (BCPs) have emerged as isosteric replacements for mono‐ and para‐substituted benzene rings in medicinal and materials applications, involving substitution at the BCP bridgehead (1,3 ...
Sean R. Verschaeve +4 more
wiley +1 more source
Phosphoramidite Gold(I)-Catalyzed Diastereo- and Enantioselective Synthesis of 3,4-Substituted Pyrrolidines [PDF]
, 2011 In this article the utility of phosphoramidite ligands in enantioselective AuI catalysis was explored in the development of highly diastereo- and enantioselective AuI-catalyzed cycloadditions of allenenes.
Benitez, Diego +4 more
core +3 more sources
Clathrate hydrate crystallization
The Canadian Journal of Chemical Engineering, EarlyView.Abstract Clathrate hydrate crystallization has been an area of interest to chemical engineers from the point of view of crystal structure, thermophysical properties, phase equilibria, kinetics, industrial applications, and environmental (climate change) implications.
Peter Englezos
wiley +1 more source
1,3-Bis(4-methylbenzoyl)-2,4-bis(2,4,5-trimethoxyphenyl)cyclobutane
IUCrData, 2017 The title compound, C38H40O8, possess an inversion centre at the centroid of the four-membered ring. The dihedral angle between the methylbenzene and trimethoxybenzene rings is 46.19 (8)°.
K. R. Raghavendra +5 more
doaj +1 more source