Zobrazeno 1 - 10 of 16 pro vyhledávání: '"Malte von Seebach"'
1
Stereoselective Preparation of Six Diastereomeric Quatercyclopropanes from Bicyclopropylidene and Some Derivatives
Autor: Jordi Benet-Buchholz, Malte von Seebach, Dmitry S. Yufit, Sergei I. Kozhushkov, Roland Boese, Heiko Schill, Armin de Meijere, Daniel Frank
Publikováno v: Chemistry - A European Journal. 13:167-177
Diastereomeric meso- and d,l-bis(bicyclopropylidenyl) (5) were obtained upon oxidation with oxygen of a higher-order cuprate generated from lithiobicyclopropylidene (4) in 50 and 31 % yield, respectively. Their perdeuterated analogues meso-[D(14)]- a
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b9e6e84bdfe6937a32164f00e8ba4951
https://doi.org/10.1002/chem.200600799
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2
Multicomponent Queuing Cascades of Bicyclopropylidene, Carbon Monoxide and Aryl Iodides or Aryl Thiols
Autor: Malte von Seebach, Ronald Grigg, Armin de Meijere
Publikováno v: European Journal of Organic Chemistry. 2002:3268-3275
Bicyclopropylidene (1) reacts with N-(2-iodophenyl)-4-methylbenzenesulfonamide (2-NTs) and carbon monoxide (2−3 bar) under mild conditions in a novel palladium-catalysed tetramolecular cascade to give the dispiro compound 3-NTs (61%). The structure
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::256ed557b282e24034e75542281f1cf6
https://doi.org/10.1002/1099-0690(200210)2002:19<3268::aid-ejoc3268>3.0.co
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3
Cyclobutylidenecyclopropane: New Synthesis and Use in 1,3-Dipolar Cycloadditions − A Direct Route to Spirocyclopropane-Annulated Azepinone Derivatives
Autor: Stefano Cicchi, Dieter Bläser, Malte von Seebach, Tula Dimoulas, Sergei I. Kozhushkov, Roland Boese, Alberto Brandi, Armin de Meijere
Publikováno v: Scopus-Elsevier
Cyclobutylidenecyclopropane (7) was prepared in multigram quantities by a new three-step sequence starting from ethyl cyclobutanecarboxylate (4) (39% overall yield). 1,3-Dipolar cycloadditions of phenyl- (9), pyridyl- (10), and the newly prepared (fo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eee597bb4473ce9642eebda3a260a211
https://doi.org/10.1002/1099-0690(200110)2001:20<3789::aid-ejoc3789>3.0.co
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5
A Third-Generation Bicyclopropylidene: Straightforward Preparation of 15,15′-Bis(hexaspiro[2.0.2.0.0.0.2.0.2.0.1.0]pentadecylidene) and aC2v-Symmetric Branched [15]Triangulane
Autor: Jordi Benet-Buchholz, Dmitrii S. Yufit, Malte von Seebach, Judith A. K. Howard, Sergei I. Kozhushkov, Armin de Meijere, Roland Boese
Publikováno v: Angewandte Chemie International Edition. 39:2495-2498
The synthesis of highly strained branched [15]triangulane I has been achieved by a copper assisted dimerization of 1-bromo-1-lithiocyclopropanes. 7,7-Dibromodispiro[2.0.2.1]heptane (II) underwent successive dimerization, cycloaddn., and dimerization
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4fcefc408e3768331fe1cae9f0f6745b
https://doi.org/10.1002/1521-3773(20000717)39:14<2495::aid-anie2495>3.0.co
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6
3-Cyclopropyl-3-(cis-1-cyclopropyl-2-phenylcyclopropyl)-1-phenylcyclopropene
Autor: Judith A. K. Howard, Dmitrii S. Yufit, Malte von Seebach, Sergei I. Kozhushkov, Armin de Meijere
Publikováno v: Acta Crystallographica Section E Structure Reports Online. 59:o1167-o1169
The structure of the first oligo 1,1-cyclo­propane, C24H24, is reported. All the three-membered rings are gauche with respect to each other. The mol­ecules are connected by a network of C—H⋯C interactions.
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::da7d4cda881ad4013d7a972a92979578
https://doi.org/10.1107/s1600536803015599
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8
Radical cations from dicyclopropylidenemethane and its octamethyl derivative
Autor: F. Gerson, Xue-Zhi Qin, Armin de Meijere, Malte von Seebach, Sergei I. Kozhushkov, Beat Muller, Thomas Bally, Vsevolod I. Borovkov, Pavel A. Potashov
Publikováno v: The journal of physical chemistry. A. 110(3)
The radical cations of dicyclopropylidenemethane (2) and its octamethyl derivative (2-Me8) are prone to rearrangements into those of (2-methylallylidene)cyclopropane (2a) and its octamethyl derivative (2a-Me8), respectively, by opening one three-memb
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a8eabd3501638cf500652d2778a44d1
https://pubmed.ncbi.nlm.nih.gov/16420021
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9
'Electromers' of the tetramethyleneethane radical cation and their nonexistence in the octamethyl derivative: interplay of experiment and theory
Autor: Fabian Gerson, Beat Müller, and Armin de Meijere, Malte von Seebach, Thomas Bally
Publikováno v: Journal of the American Chemical Society. 125(45)
Bicyclopropylidene 1a and its octamethyl derivative 1b are subjected to ionization by X-irradiation in solid argon. In accord with previous experiments, this treatment leads to the spontaneous opening of both cyclopropylidene rings, as does ionizatio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2378649fc54af1dcd414c8c690e3d6ea
https://pubmed.ncbi.nlm.nih.gov/14599217
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