Results 101 to 110 of about 167 (149)

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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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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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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ChemInform Abstract: REACTION OF SEMICYCLIC 1,5‐DIKETONES WITH PHENYLPHOSPHINE

Chemischer Informationsdienst, 1980
AbstractDie 1,5‐Diketone (I) cyclisieren mit Phenylphosphin (II) zu 8a‐Hydroxy‐l ,2‐di‐ bzw. ‐1 ,2,4‐triphenylperhydro‐phosphinolin‐1‐onen (IIIa) bzw. (IIIb), die beide in 2 stereoisomeren Formen (aß) vorliegen.
V. I. VYSOTSKII, S. M. KALINOV, M. N. TILICHENKO   +2 more
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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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Human Exploration of Mars via Earth-Mars Semicyclers

Journal of Spacecraft and Rockets, 2007
We present an architecture for the human exploration of Mars. This architecture is characterized by the use of parking orbits at Earth and gravity assists at Mars. An interplanetary transfer vehicle cycles from Earth orbit to Marsflyby andback, eliminating the need to launch transfer vehicles from the surfaces ofEarth andMars.Necessary developments for
Damon F. Landau, James M. Longuski
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ChemInform Abstract: Semicyclic 3‐Trifloxypropen‐ and Propyniminium Triflates.

ChemInform, 1994
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.
R. REINHARD, G. MAAS, J. BOHRISCH, J. LIEBSCHER   +3 more
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Norrish Type II Photo-Deacylation of Semicyclic Imides

HETEROCYCLES, 1993
The photochemical deacylation of 1,4-diacyl-2,5-piperazinediones was found to proceed through the type II ketene eliminating ...
Akira Sera, Manabu Okada, Akira Ohhata, Hiroaki Yamada, Kuniaki Itoh, Yasuo Kubo   +5 more
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Two-Dimensional Optical Orthogonal Codes and Semicyclic Group Divisible Designs

IEEE Transactions on Information Theory, 2010
A (nxm, k, ?) two-dimensional optical orthogonal code (2-D OOC), C, is a family of nxm (0, 1)-arrays of constant weight k such that ?i=1n?j=0m-1A(i, j)B(i, j?m?) ? ? for any arrays A, B in C and any integer ? except when A = B and ? ? 0 (mod m ), where ?m denotes addition modulo m.
Jianmin Wang 0003, Jianxing Yin
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