Results 261 to 270 of about 35,436 (307)
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Enantioselective methodologies for the synthesis of spiro compounds
Chem. Soc. Rev., 2012The enantioselective synthesis of spirocycles has been a long time pursued dream for organic chemists. Since the first pioneering efforts of Tamao and coworkers in the enantioselective construction of spirosilanes, many efforts have been devoted to the development of new and promising asymmetric methodologies.
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ChemInform Abstract: HETEROCYCLIC SPIRO COMPOUNDS. SPIRO‐SUBSTITUTED BENZOTHIAZOLINES
Chemischer Informationsdienst, 1981AbstractDurch Kondensation des Mercaptoanilins (I) mit den entsprechenden cyclischen Ketonen werden die Spiroverbindungen (II)‐(VI) dargestellt.
F. SAUTER, P. STANETTY, A. BLASCHKE
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Synthesis of Tricyclic Spiro Compounds on the Basis of Alloocimene.
ChemInform, 2005AbstractFor Abstract see ChemInform Abstract in Full Text.
E. Kh. Balbolov +2 more
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Electronic properties of spiro compounds for organic electronics
The Journal of Chemical Physics, 2012The electronic properties of p-type, n-type, and ambipolar spiro materials have been investigated using a combination of photoemission spectroscopy, electron energy-loss spectroscopy, and density functional based calculations. Our results provide insight into the occupied density of states as well as the electronic excitation spectra.
Benjamin, Mahns +8 more
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Compounds with Phosphorus at the Spiro Position
ChemInform, 2001Publisher Summary Four coordinate phosphorus can occupy a spiro position to form compounds analogous to the corresponding quaternary ammonium compounds. There are a number of six coordinate spiro phosphorus compounds. Compounds which have interactions completing the spiro system have been included in this chapter.
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Spiro-compounds, synthesis and catalytic dehydrogenation of substituted spiro[5,5] undecanes
Tetrahedron, 1976Abstract Catalytic dehydrogenation of 1-propyl-8,9-benzospiro[5,5]undecane-7-ol (5: R = H), and 1-propyl-3′-methyl-8,9-benzospiro[5,5]undecane-7-ol (5: R = Me) has been carried out to study the effect of a bulky alkyl group on the ring in the ring transformation of the spiro[5,5]undecane system. The catalytic dehydrogenation of the spiro-compound 5(R
A. Mitra, M. Dutta Gupta
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Ultrafast optical dynamics of spiro-compounds
Synthetic Metals, 2001We report on time-resolved measurements of spiro-type molecules in the ps- and fs-timescale. Due to the orthogonality of the transition dipoles of two identical moieties connected through a spiro-atom, one expects these compounds to show two perpendicular, degenerate states that may enter into a complex free evolution upon fs excitation.
Milota, Franz +6 more
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2019
Spiro compounds (also named as spiranes following the suggestion of Adolf von Baeyer as early as 1900) are ubiquitous molecules, which contain a fused bicyclic system that share a single atom. A search for the key term “spiro” in the SciFinder database at the beginning of April 2017 resulted in more than 147,000 hits including 5000–6000 publications ...
Burke, Anthony, Somsák, Lazlo
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Spiro compounds (also named as spiranes following the suggestion of Adolf von Baeyer as early as 1900) are ubiquitous molecules, which contain a fused bicyclic system that share a single atom. A search for the key term “spiro” in the SciFinder database at the beginning of April 2017 resulted in more than 147,000 hits including 5000–6000 publications ...
Burke, Anthony, Somsák, Lazlo
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Cannabis XXII. Synthesis of spiro-compounds
Tetrahedron Letters, 1981Abstract O-methyl-cannabispirenone has been synthesized by two new methods applying spiroannelation on 5,7-dimethoxyindan-1-aldehyde. An alternative high yield synthesis of the latter has been elaborated.
J. Novák, C.A. Salemink
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