Results 91 to 100 of about 118 (112)

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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ChemInform Abstract: Norrish Type II Photo‐Deacylation of Semicyclic Imides.

ChemInform, 1993
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.
A. SERA, M. OKADA, A. OHHATA, H. YAMADA, K. ITOH, Y. KUBO   +5 more
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(ω-Ammonioalkyl)cyclopentadienides by Rhodium-Catalyzed Vinylcarbene Transfer to Semicyclic Enaminocarbonyl Compounds

Organic Letters, 1999
The rhodium(II)-catalyzed reaction of vinyldiazoacetate 2 with semicyclic β-enaminocarbonyl compounds 1 provides (ω-(methylammonio)alkyl)cyclopentadienides 3. This transformation represents a novel reaction cascade which combines carbenoid addition at a CC bond with ring-chain transformation.
Gerhard Maas, Andreas Müller
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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, Jianxing Yin
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ChemInform Abstract: Ring Transformations of Semicyclic 1,3‐Dicarbonyl Heteroanalogs. Part 4. Synthesis of 3‐(ω‐Aminoalkyl)‐1,2,4‐thiadiazoles by Ring Transformation Reaction of Semicyclic Thioacylamidines with 3,3‐ Pentamethyleneoxaziridine.

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.
M. PAETZEL, J. LIEBSCHER, S. ANDREAE, E. SCHMITZ   +3 more
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Ring Transformations of Semicyclic 1,3-Dicarbonyl Heteroanalogs; IV¹. Synthesis of 3-(ω-Aminoalkyl)-1,2,4-thiadiazoles by Ring Transformation Reaction of Semicyclic Thioacylamidines with 3,3-Pentamethyleneoxaziridine

Synthesis, 1990
Semicyclic thioacylamidines 1 react with 3,3-pentamethylene-oxaziridine by ring transformation affording novel ω-aminoalkyl-1,2,4-thiadiazoles 5, which are conveniently isolated as hydrochlorides 6. These can be transformed to the corresponding free bases 5, which in one case are methylated at the amino group to give an ω-dimethylaminoalkyl-1,2,4 ...
Michael Pätzel, Jürgen Liebscher, Siegfried Andreae, Ernst Schmitz   +3 more
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Lewis Acid-Catalyzed Ring-Opening Reactions of Semicyclic N,O-Acetals

Organic Letters, 2001
[figure: see text] Ring-opening reactions of semicyclic N,O-acetals with various nucleophiles such as silyl enol ethers are effectively catalyzed by a Lewis acid (TMSOTf). Reactions of 3-substituted N,O-acetals showed high diastereoselectivities. Synthetic utility of this method has been demonstrated in the stereoselective synthesis of an anti-malarial
M, Sugiura, S, Kobayashi
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ChemInform Abstract: Synthesis and Diels‐Alder Reactions of Semicyclic Sugar‐Containing Dienes.

ChemInform, 1996
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.
A. ABAS, R. L. BEDDOES, J. C. CONWAY, P. QUAYLE, C. J. URCH   +4 more
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Forcing linearity numbers of semicyclic modules over commutative Noetherian rings

Abhandlungen aus dem Mathematischen Seminar der Universität Hamburg, 2003
Given a module \(V\) over a commutative ring \(R\), a function \(f:V\rightarrow V\) is said to be ``homogeneous'' if \(f(rv) = rf(v)\) for all \(r\in R\) and all \(v\in V\) and \(M_R(V)\) denotes the set of all such functions. Clearly \(M_R(V)\) is contained in \(\text{End}_R(V)\), the set of module endomorphisms on \(V\). This paper looks at how close
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ChemInform Abstract: Reaction of Semicyclic 1,5‐Diketones with Bis(trimethylsiloxy) phosphine.

ChemInform, 1993
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.
V. I. VYSOTSSKII, S. V. LEVAN'KOV
openaire   +1 more source