Zobrazeno 1 - 10
of 692
pro vyhledávání: '"Mathias Noltemeyer"'
Publikováno v:
Tetrahedron. 65:5192-5198
The acid catalyzed rearrangement of two cyclohexanols of spiroannelated four-membered rings has been studied. In accordance with molecular mechanics calculations, far-reaching reorganizations with formation of unsaturated hexacyclic systems, includin
Publikováno v:
Tetrahedron. 65:1040-1047
New approaches to the protoilludane sesquiterpenes (±)-cerapicol and (±)-sterpurene via rearrangement routes are described. The absolute configuration of (+)-cerapicol has been determined and found in accord with a biosynthesis of the natural produ
Publikováno v:
European Journal of Organic Chemistry. 2008:1072-1078
A three-component domino Heck–Diels–Alder reaction involving pinacol bicyclopropylideneboronate (8b), iodobenzene (9) and methyl acrylate (12) under Jeffery conditions [Pd(OAc)2, PPh3, K2CO3, Et4NCl, MeCN] produced a mixture of phenylspiro[2.5]oc
Publikováno v:
Zeitschrift für Naturforschung B. 62:1358-1370
Depending on the reaction conditions, ketones react with n-BuLi, tert-BuLi or lithium diisopropylamide to give enolates or alcoholates. In the reaction of tert-butylmethylketone with n-BuLi followed by fluorosilanes, the fluorosilyl-enolates H2C=C(O-
Publikováno v:
Zeitschrift für Naturforschung B. 62:1371-1376
5,5-Dimethylcyclohexane-1,3-dione (dimedone) and cyclohexane-1,3-dione react with Cl2Si(CMe3)2 in the presence of triethylamine to give the bis(1-cyclohexene-3-on-1-oxy)dit butylsilanes 2 and 3. Using dimedone and Cl2SiMe2, the analogous dimethylsila
Publikováno v:
European Journal of Organic Chemistry
A palladium-catalyzed reaction of methylenespiropentane (11) with iodobenzene (12) under typical Heck conditions [Pd(OAc)2, PPh3, Et3N, DMF] produced a mixture of the unstable [3]dendralene 13 and allylidenecyclopropane 14 in 38 % yield. When an anal
Publikováno v:
Zeitschrift für anorganische und allgemeine Chemie. 633:1223-1232
2,2-Difluor-1,3-diaza-2-sila-cyclopentene – Synthesis and Reactions N,N′-Di-tert-butyl-1,4-diaza-1,3-butadiene reacts with elemental lithium under reduction to give a dilithium salt, which forms with fluorosilanes the diazasilacyclopentenes 1–4
Autor:
Rainer Oswald, Mathias Noltemeyer, Prabhuodeyara M. Gurubasavaraj, Swadhin K. Mandal, Herbert W. Roesky, and Aritra Pal
Publikováno v:
Inorganic Chemistry. 46:1056-1061
Two single oxygen-bridged heterobimetallic oxides of Al(III) with group 4 metals (Ti, Hf) have been prepared. The reaction of LAlMeOH (1) [L = CH(N(Ar)(CMe))2, Ar = 2,6-iPr2C6H3] with dimethylmetallocenes of Ti and Hf in toluene (80 degrees C) and et
Publikováno v:
Organometallics. 26:838-845
The lithium salt of Me 3 CSiMe 2 NH 2 reacted with halosilanes to give the bis(silyl)amines 1-3, Me 3 -CSiMe 2 NHSiMe 2 R (1: R = H, 2: R = Me, 3: R = CMe 3 ), which form lithium salts with BuLi. 4, the lithium salt of 1, crystallized as the trimer v
Publikováno v:
Zeitschrift für Naturforschung B. 61:1261-1274
The results of quantum chemical calculations on lithium ketazides suggest mainly four isomeric structures with different modes of lithium coordination (A-D). A monolithium ketazide thf-adduct (1) was isolated supporting the results of the quantum che