Synthetic studies on ecteinascidin 743: rapid access to the fully functionalized tetrahydroisoquinoline with a bridged 10-membered sulfur containing macrocycleElectronic supplementary information (ESI) available: spectroscopic data for all new compounds and X-ray data for compound 14. See http://www.rsc.org/suppdata/cc/b3/b309824a/

2003 ◽  
pp. 2896 ◽  
Author(s):  
Micha�l De Paolis ◽  
Ang�le Chiaroni ◽  
Jieping Zhu
Keyword(s):  
Spectroscopic Data ◽  
Supplementary Information ◽  
X Ray ◽  
Rapid Access ◽  
Synthetic Studies ◽  
Ecteinascidin 743 ◽  
New Compounds ◽  
Sulfur Containing

Synthese und Kristallstrukturen einiger Tetramethylstibonium-Hydrogendicarboxylate / Synthesis and Crystal Structures of Some Tetramethylstibonium Hydrogendicarboxylates

1982 ◽  
Vol 37 (11) ◽  
pp. 1393-1401 ◽  
Author(s):  
Beatrix Milewski-Mahrla ◽  
Hubert Schmidbaur
Keyword(s):  
Hydrogen Bonds ◽  
Crystal Structures ◽  
Spectroscopic Data ◽  
Molar Ratio ◽  
Ionic Structure ◽  
X Ray Diffraction ◽  
X Ray ◽  
Carboxylate Oxygen ◽  
Donor Acceptor ◽  
New Compounds

Reactions of pentamethylantimony (CH3)5Sb with carboxylic acids in the molar ratio 1:2 afford one equivalent of methane and essentially quantitative yields of crystalline tetramothylstibonium hydrogendicarboxylates. Six new compounds of this series have been synthesized using benzoic, o-phthalic, salicylic, 4-ethoxy-salicylic, oxalic, and malic acid, and characterized by analytical and spectroscopic data. An ionic structure with strong hydrogen bonds in the anionic components is proposed.The crystal structures of the hydrogen-dibenzoato (1), hydrogen-ortho-plithalato (2) and 4-ethoxy-hydrogen-salicylate (3) were determined by single crystal X-ray diffraction. The compounds can be described as having ionic lattices with some donor-acceptor inter­actions between the stibonium centers and the carboxylate oxygen atoms. The anions are characterized by strong hydrogen bonds O...H...O. Thus, the (CH3)4Sb-tetrahedron in 1 is distorted by two benzoate oxygon atoms (at 304(2) and 340(2) pin). The cation in 2 is largely undistorted and the anion has a hydrogenphthalate hydrogen bond of d(O...H...O) = 232 pm. The cation-anion contact in 3 is as short as d(Sb-O) = 289 pm rendering the Sb atom pentacoordinate.

scholarly journals Übergangsmetall-Carben-Komplexe, CXXXIV [1]. Synthese neuer Mono- und Biscarben-Komplexe der VI. Nebengruppe; Röntgenstruktur des ersten Bis[amino(alkoxy)carben]-Komplexes / Transition Metal Carbene Complexes, CXXXIV [1]. Synthesis of New Mono- and Bis-Carbene Complexes of Group VIb Elements; Structure of the First Bis[amino(alkoxy)carbene]-Complex

1984 ◽  
Vol 39 (5) ◽  
pp. 668-674 ◽  
Author(s):  
Ernst Otto Fischer ◽  
Rudolf Reitmeier ◽  
Klaus Ackermann
Keyword(s):  
Molecular Structure ◽  
Transition Metal ◽  
Spectroscopic Data ◽  
The Novel ◽  
Nucleophilic Agent ◽  
Reaction Conditions ◽  
Carbene Complexes ◽  
X Ray ◽  
X Ray Crystallography ◽  
New Compounds

The hexacarbonyl compounds of chromium, molybdenum and tungsten react with the highly nucleophilic agent Li NiPr2 and in a subsequent alkylation with (Et3O)BF4 to give the carbene complexes (CO)5M[C(N′Pr2)OEt] (1, 3, 4). In case of W(CO)6 and Mo(CO)6 the novel biscarbene complexes cis(CO)4M[C(NiPr2)OEt]2 (2, 5) are additionally obtained. Reaction conditions, properties and spectroscopic data of the new compounds are reported. The molecular structure of cis(CO)4W[C(NiPr2)OEt]2 (4) was determined by X-ray crystallography

Selektive Additionsreaktionen an bifunktionalen neutralen Phosphenium-Ion-Komplexen / Selective Addition Reactions of Bifunctional Neutral Phosphenium Ion Complexes

1991 ◽  
Vol 46 (12) ◽  
pp. 1650-1658 ◽  
Author(s):  
Heinrich Lang ◽  
Michael Leise ◽  
Wolfgang Imhof
Keyword(s):  
Triple Bond ◽  
Spectroscopic Data ◽  
Multiple Bond ◽  
Addition Reactions ◽  
X Ray ◽  
Higher Temperature ◽  
New Compounds ◽  
Selective Addition ◽  
C Nmr ◽  
Membered Heterocyclic Compound

The reaction of bifunctional neutral phosphenium ion complexes, containing a carbon-carbon triple bond next to a phosphorus-molybdenum multiple bond, with carbenes and to carbene isolobal organometallic fragments is discussed.So, the reaction of (R)(PhC=C)P=MoCp′(CO), (R = 2,4,6-′Bu3C6H2O; Cp′ = η5-C5H5: la; Cp′ = η5-C5Me5: 1b) with CH2,Ν2 (2) yields the three membered heterocyclic compound (3). 3 reacts with Co2(CO)8 to afford complex (5) in which the phenylethynyl building block is η2-side-on coordinated to a Co2(CO)6 fragment. Similar to the reaction of 1 with 2, 1 forms with Fe2(CO)9 (6), compound (7). In 7 the PMo double bond is coordinated in a η2 fashion to the 16-electron organometallic fragment Fe(CO)4. Using an excess of 6 and a higher temperature, the phosphorus-alkynyl-carbon σ-bond is cleaved, and cluster MoCp*Fe3(CO)8η3-PR)(C≡CPh) (8) is formed.The reaction of 1 with Cr(CO)5(THF) yields 10, a complex, in which the PhC≡C ligand is η2-coordinated to Cp′(CO)2Mo, and the Cr(CO)5 group forms a dative bond with the phosphorus atom.All new compounds have been characterized by analytical as well as by spectroscopic data (IR, 1H, 31P, 13C NMR, MS), compound 10 by an X-ray analysis.

scholarly journals New Piperazine Derivatives Synthesized from Thio-Substituted Polyhalogeno-2-nitro-1,3-butadienes

2010 ◽  
Vol 7 (4) ◽  
pp. 1498-1506 ◽  
Author(s):  
S. Goksin Aydinli ◽  
Cemil Ibis
Keyword(s):  
Single Crystal ◽  
Spectroscopic Data ◽  
The Novel ◽  
X Ray ◽  
Piperazine Derivatives ◽  
Bioactive Heterocycles ◽  
New Compounds

It is known that polyhalogeno-nitro-1,3-butadienes are important starting materials for the synthesis of polyfunctionalized bioactive heterocycles. NovelN,S-substituted nitrobutadienes (4a-j) were synthesized from the reaction of the monothio-substituted nitrodiene derivatives (2a) and (2b) with some piperazine derivatives. These new compounds are stable and the structures of these products were characterized by spectroscopic data. The structure of the novelN,S-substituted nitrodiene compound (4g) synthesized in this study was also elucidated by single crystal x-ray analysis.

Metallkomplexe mit funktionalisierten Schwefelliganden, V Ruthenium(II)-Alkyl- und -Arylthiosulfinato-Komplexe. Kristallstrukturanalyse von CpRu(PPh3)(CO)[S-S(O)-CH2-C6H5] / Metal Complexes of Functionalized Sulfur Containing Ligands, V Ruthenium(II)-Alkyl-and -Arylthiosulfinato Complexes. X-Ray Structure Determination of CpRu(PPh3)(CO)[S-S(O)-CH2-C6H5]

1993 ◽  
Vol 48 (5) ◽  
pp. 627-635 ◽  
Author(s):  
Wolfgang Weigand ◽  
Gabriele Bosl ◽  
Christian Robl ◽  
Jürgen Kroner
Keyword(s):  
Bond Length ◽  
Structure Determination ◽  
Spectroscopic Data ◽  
Structural Determination ◽  
Chiral Complexes ◽  
X Ray ◽  
Extended Hückel Calculations ◽  
Sulfur Containing ◽  
Sulfur Bond

Compounds of the type CpRu(PPh3)(L)(SH) [L = PPh3 (2), CO (4)] react with N-alkyl and -arylsulfinyl phthalimides 3a-f to give the chiral complexes CpRu(PPh3)(L)[S-S(O)-R] (L = PPh3, 5a: R = C4H9,5b: R = C12H25,5d: R = C18H37,5e: R = Tol; L = CO, 6a: R = C4H9,6b: R = C12H25,6c: R = C16H33,6d: R = C18H37,6f: R = CH2Ph). With 6a-c diastereoselectivities of 5:2, with 6d 5:1, and with 6f 10:3, respectively, are observed. The compounds 5,6 are characterized by their spectroscopic data; the X-ray structural determination of u-6f shows a sulfur-sulfur bond length of 208,6 (3) pm, the dihedral angle Ru-S(1)-S(2)-C(25) is 170,8°. Extended Hückel calculations give information about the rotational barrier around the S-S(O) axis.

Sign in / Sign up

Export Citation Format

Share Document