Results 91 to 100 of about 176 (125)

Local Stability, Semicycles, Periodicity, and Invariant Intervals

, 2001
exaly   +5 more sources

Systems of Difference Equations,Stability, and Semicycles

, 2002
exaly   +3 more sources

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Synthesis of Semicyclic/Exocyclic Amino-1,3-dienes by organocuprate addition to semicyclic propyniminium salts

Journal f�r Praktische Chemie/Chemiker-Zeitung, 1996
Conjugate addition of organocuprates to the 2-ethynyl-substituted cyclic iminium triflates 3 generates aminoallenes which tautomerize immediately to semicyclic 2-amino-1,3-dienes (6, 8) or exocyclic 1-amino-1,3-dienes (9, 10) with the enamine function incorporated into or attached to a 5-, 6-, or 7-membered ring.
G. Maas, R. Reinhard, R. Neumann, M. Glaser   +3 more
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SEMICYCLIC THIOACETALS AS SYNTHETIC BUILDING BLOCKS

Phosphorus, Sulfur, and Silicon and the Related Elements, 1991
Abstract 1,3-Dithianes are very well known as “Umpolung” reagents, whereas open-chained thioacetals are far less useful for carbon-carbon bond formation reactions1.
Jürgen Voss, Askan Böge, Jörg-Stephan Brunck   +2 more
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A Semicycle of Ground-Potential Rise

IEEE Transactions on Communications, 1972
A brief description is presented of why the power utilities need communication during faults. Wire communication channels can supply this need when suitably protected. The maximum groundpotential rise is needed to select protective equipment. How this transient voltage is generated with its wave shape and duration is explained for a single phase-to ...
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Semicyclic 3‐Trifloxypropen‐ and Propyniminium Triflates

Liebigs Annalen der Chemie, 1994
AbstractO‐Sulfonylation of 2‐oxomethylene‐substituted 1‐azaheterocycles 1 yields the 3‐trifloxypropeniminium triflates 2a–e in high yield. Thermal β‐elimination of triflic acid from these salts affords the propyniminium triflates (2‐ethynylcycliminium triflates) 3a–e.
Robert Reinhard, Gerhard Maas, Jörg Bohrisch, Jürgen Liebscher   +3 more
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Subgroups of semicyclic n-ary groups

Journal of Mathematical Sciences, 2010
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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ChemInform Abstract: Semicyclic Thioacetals as Synthetic Building Blocks.

ChemInform, 1991
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
J. VOSS, A. BOEGE, J.‐S. BRUNCK
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EPC syntheses and structure–activity relationships of hypoglycaemic semicyclic amidines

European Journal of Medicinal Chemistry, 2000
A series of homochiral sterically hindered mono- and bicyclic amidines was prepared as hypoglycaemic agents by lethargic reaction of O-methylcaprolactim and 3-ethoxy-2-azabicyclo[2.2.2]oct-2-ene, respectively, with homochiral cis-2-substituted cyclopentane amines provided by asymmetrical reductive amination of racemic 2-substituted cyclopentanones. All
S, Hartmann, S, Ullrich, C, Hupfer, A W, Frahm   +3 more
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Semicyclic 4-GDDs and related two-dimensional optical orthogonal codes

Designs, Codes and Cryptography, 2011
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Kun Wang, Jianmin Wang 0003
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