Results 251 to 260 of about 3,829,488 (297)

Synthesis of New Pinane-Type Hetarylsulfides

Chemistry of Natural Compounds, 2014
© 2014 Springer Science+Business Media New York. New bicyclic thioterpenoids with heterocyclic fragments were prepared via reactions of (-)-β-pinene and its oxide with 1-phenyl-1H-tetrazole-5-thiol, 1-methylimidazole-2-thiol, and 4,6-dimethyl-2-pyrimidinesulfenylchloride.
Startseva V., Bodrov A., Arefev A., Kuznetsov I., Lodochnikova O., Klochkov V., Nikitina L.   +6 more
openaire   +3 more sources

Synthesis of new carbamate-type harmicines

2022
Harmine is a naturally occurring β-carboline alkaloid that possesses a broad range of biological activities, including antitumor and antimalarial. We designed and prepared several series of hybrid compounds in which harmine was covalently linked to other biologically active compounds: cinnamic acid derivatives (CADs, harmicines), quinolines (harmiquins)
Marinović, Marina, Rajić, Zrinka
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Stereocontrolled Synthesis of Ara‐Type Cyclohexenyl Nucleosides.

ChemInform, 2003
AbstractFor Abstract see ChemInform Abstract in Full Text.
Jing, Wang, Dolores, Viña, Roger, Busson, Piet, Herdewijn   +3 more
openaire   +2 more sources

A New Type of Corrin Synthesis

Angewandte Chemie International Edition in English, 1969
AbstractWork towards a synthesis of vitamin B12 has inspired a new type of corrin synthesis. The key step is a light‐induced 1,16‐hydrogen transfer leading to an antarafacial (π→σ)‐cycloisomerization of a seco‐corrinoid metal complex. The construction of the seco‐corrinoid ligand system is achieved by coupling monocyclic ring precursors in their ...
Y, Yamada, D, Miljkovic, P, Wehrli, B, Golding, P, Löliger, R, Keese, K, Müller, A, Eschenmoser   +7 more
openaire   +2 more sources

Spectral synthesis for Euler type operators

Analysis Mathematica, 1989
Let A be the square matrix \((a_{i_ j})\) U be a domain in \(C^ k\), and H(u) be the space of holomorphic functions in U with the locally uniform convergence topology. The author proves that under some stated conditions on the matrix A, and the domain U, the invariant subspace \(W\subset H(U)\) admits a spectral synthesis.
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Biogentic-type synthesis of cularine

Bioorganic Chemistry, 1971
Abstract The phenolic oxidation of 1,2,3,4-tetrahydro-8-hydroxy-1-(3-hydroxy-4-methoxy-benzyl)-7-methoxy-2-methylisoquinoline ( 2 ) with alkaline ferricyanide gave a demethylcularine ( 4 ) and its isomer ( 5 ). The former was converted into cularine ( 1 ).
T. Kametani, K. Fukumoto, M. Fujihara
openaire   +1 more source

Asymmetric Synthesis of Scillascillin-Type Homoisoflavonoid

Organic Letters
The first asymmetric synthesis of a scillascillin-type homoisoflavonoid was reported. Key reactions for the asymmetric synthesis of benzocyclobutene include catalytic reductive desymmetrization of malonic ester and an intramolecular C-H activation of the methyl group.
Huachao Wang, Zhiyu Gao, Jing Wang, Dantong Chen, Yanhai Wang, Hui Sun, Hong-Dong Hao, Li Ren   +7 more
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Synthesis of samanine type alkaloids

Tetrahedron Letters, 1973
Aus dem bekannten Cyan-aldehyd (I) kann durch Reduktion und Tosylierung das Nitriltosylat (II) erhalten und zu (III) cyclisiert werden.
R.Balaji Rao, Larry Weiler
openaire   +1 more source

Synthesis of cadinane type sesquiterpenes

Journal of the Chemical Society, Chemical Communications, 1979
A new and convenient synthesis of cadinane type sesquiterpenes is reported from the tricyclo-[4.4.0.02,5]decane photoadduct (1).
John R. Williams, James F. Callahan
openaire   +1 more source

Enantioselective Synthesis of Acenaphthene-Type Monohydrosilanes

Organic Letters
Acenaphthene and its analogues are privileged frameworks in medicinal chemistry and material science. However, the properties of silicon-substituted acenaphthene-type scaffolds are poorly understood. Here, we report a rhodium-catalyzed intramolecular C(sp3)-H silylation for enantioselective synthesis of acenaphthene-type scaffolds with excellent ...
Delong Mu, Xinrui Zhu, Jiean Chen
openaire   +2 more sources