نتایج جستجو برای: knorr condensation
تعداد نتایج: 32579 فیلتر نتایج به سال:
The biological significance of glycoconjugates has stimulated a great synthetic activity in the synthesis of these structurally demanding compounds. These efforts were in the beginning mainly concentrated on improvements of the well-known KOENIGS-KNORR METHOD providing finally a very valuable methodology for glycoconjugate synthesis. However, due to several, mainly inherent disadvantages other ...
In recent decades, the concept of ‘culture’ has had a strangely bifurcated history. 1 The critique implicit in Said’s questions has been deeply influential, especially in social anthropology, for which ‘culture’ was the single most central concept. By 1996, an encyclopaedia of the discipline talked of the possibility of ‘abandon[ing] talk of different “cultures” altogether, because of its taint...
In this work, some 2-nonsubstituted/2-methyl-/2-(2-acetyloxyethyl)-6-[4-(substituted pyrrol-1-yl)phenyl]-4,5-dihydro-3(2H)-pyridazinone, derivatives and 2-nonsubstituted/2-methyl- 4-[4-(substituted pyrrol-1-yl)phenyl]-1(2H)-phthalazinone derivatives were synthesised by reacting hexan-2,5-dion or 1-aryl-3-carbethoxypent-1,4-diones with corresponding 2-substituted/nonsubstituted 6-(4'-aminophenyl...
Contributing Authors D. Archer, M.R. Ashmore, O. Aumont, D. Baker, M. Battle, M. Bender, L.P. Bopp, P. Bousquet, K. Caldeira, P. Ciais, P.M. Cox, W. Cramer, F. Dentener, I.G. Enting, C.B. Field, P. Friedlingstein, E.A. Holland, R.A. Houghton, J.I. House, A. Ishida, A.K. Jain, I.A. Janssens, F. Joos, T. Kaminski, C.D. Keeling, R.F. Keeling, D.W. Kicklighter, K.E. Kohfeld, W. Knorr, R. Law, T. Le...
Open source processes have attracted considerable attention recently. The underlying motivation for this surging interest is strikingly varied. Open source is not so much a precisely defined and delineated topic as an evolving, intrinsically ambiguous phenomenon. From a marginal, esoteric interest around ‘hacker’ sub-cultures (Turkle, 1985; Hannemyr, 1999), open source is emerging as a theme wi...
The long-term goal of this project is to understand the patterns and timing of latest Pleistocene sedimentation in the Geoclutter area of the NJ margin. Paleoenvironmental reconstructions of the study area were developed using benthic foraminifera and sediment texture analyses of drill cores obtained in Fall 2002 using the ACHC-800 from the RV Knorr. This award was extended through October 31, ...
The title pyrrole derivative compound, C(12)H(17)NO(4), was synthesized from methyl 3-oxopenta-noate by a Knorr-type reaction and contains a pyrrole ring to which two diagonal alk-oxy-carbonyl groups and two diagonal alkyl substituents are attached. The methyl-carbonyl and ethyl-carbonyl substituents are approximately co-planar with the pyrrole ring, making dihedral angles of 5.64 (2) and 3.44 ...
Paper I Knorr U, Vinberg M, Klose M, Feldt-Rasmussen U, Hilsted L, Gade A, Haastrup E, Paulson O, Wetterslev J, Gluud C, Gether U, and Kessing LV. Rationale and design of the participant, investigator, observer, and data-analyst-blinded randomised AGENDA trial on associations between gene-polymorphisms, endophenotypes for depression and antidepressive intervention: the effect of escitalopram ve...
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