ChemInform Abstract: Cycloaddition Reactions of Organometal Complexes. Part 8. Vinylidene- Metal Complexes as Building-Blocks for Novel Five-Membered Metalla- Heterocycles.

We report here the preparation (in "one-pot") of a tetra-β″-sulfoleno-meso-aryl-porphyrin in about 80% yield by using an optimized modification of Lindsey's variant of the Adler–Longo approach. The Zn ( II )-, Cu ( II )- and Ni ( II )-complexes of the symmetrical porphyrin were prepared and characterized spectroscopically. Crystal structures of the fluorescent Zn ( II )- and of the non-fluorescent Ni ( II )-tetra-β″-sulfoleno-meso-aryl-porphyrinates showed the highly substituted porphyrin ligands to be nearly perfectly planar. The Zn ( II )-complex of this porphyrin has been used as a thermal precursor of a reactive diene, and — formally — of lateral and diagonal bis-dienes, of a tris-diene and of a tetra-diene, which all underwent [4 + 2]-cycloaddition reactions in situ with a range of dienophiles. Thus, the tetra-β″-sulfoleno-meso-aryl-porphyrin and its metal complexes represent reactive building blocks, "programmed" for the syntheses of symmetrical and highly functionalized porphyrins.

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2,2':6',2''-Terpyridine metal complexes as building blocks for extended functional metallo-supramolecular assemblies and polymers

Synthetic Metals ◽

10.1016/s0379-6779(00)01430-2 ◽

2001 ◽

Vol 121 (1-3) ◽

pp. 1249-1252 ◽

Cited By ~ 63

Author(s):

U.S. Schubert ◽

C. Eschbaumer ◽

P. Andres ◽

H. Hofmeier ◽

C.H. Weidl ◽

...

Keyword(s):

Metal Complexes ◽

Building Blocks ◽

Supramolecular Assemblies

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1,10-Phenanthrolines: versatile building blocks for luminescent molecules, materials and metal complexes

Chemical Society Reviews ◽

10.1039/b806408n ◽

2009 ◽

Vol 38 (6) ◽

pp. 1690 ◽

Cited By ~ 256

Author(s):

Gianluca Accorsi ◽

Andrea Listorti ◽

K. Yoosaf ◽

Nicola Armaroli

Keyword(s):

Metal Complexes ◽

Building Blocks

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Vinylidene Transition-metal complexes, VI. The rhodium compounds C5H5Rh(CCHR)PiPr3 as building blocks for the synthesis of heterometallic Di- and trinuclear vinylidene-bridged complexes

Chemische Berichte ◽

10.1002/cber.19881210906 ◽

1988 ◽

Vol 121 (9) ◽

pp. 1565-1573 ◽

Cited By ~ 35

Author(s):

Helmut Werner ◽

Francesco Javier Garcia Alonso ◽

Heiko Otto ◽

Karl Peters ◽

Hans Georg Von Schnering

Keyword(s):

Transition Metal ◽

Metal Complexes ◽

Transition Metal Complexes ◽

Building Blocks

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Synthesis, spectroscopic, thermal, and structural properties of cyano-bridged metal complexes containing tetracyanonickelate(II) building blocks with 4-aminomethylpyridine

Journal of the Turkish Chemical Society Section A Chemistry ◽

10.18596/jotcsa.453521 ◽

2019 ◽

pp. 395-402

Author(s):

Dursun KARAAĞAÇ

Keyword(s):

Metal Complexes ◽

Structural Properties ◽

Building Blocks

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Brominated β-Alkoxyvinyl Trihalomethyl Ketones as Promising Synthons in Heterocyclic Synthesis

Synthesis ◽

10.1055/s-0039-1690890 ◽

2020 ◽

Vol 52 (14) ◽

pp. 2008-2016

Author(s):

Mateus Mittersteiner ◽

Nilo Zanatta ◽

Helio G. Bonacorso ◽

Marcos A. P. Martins

Keyword(s):

First Generation ◽

Second Generation ◽

Building Blocks ◽

Third Generation ◽

Cycloaddition Reactions ◽

Heterocyclic Synthesis

5-Bromo- and 5,5-dibromo-1,1,1-trihalo-4-methoxypent-3-en-2-ones (brominated enones) have proven to be attractive building blocks for the construction of heterocyclic and polyheterocyclic compounds bearing a trihalomethyl moiety through interesting cyclocondensation, alkylation, and cycloaddition reactions. This review compiles all of the reactions conducted with these brominated enones since they were first disclosed in 2001.1 Introduction2 Synthesis and Initial Applications3 Synthesis Using First-Generation Intermediates4 Synthesis Using Second-Generation Intermediates5 Synthesis Using Third-Generation Intermediates6 Conclusions

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Catalytic Enantioselective Reactions with (Benzo)Pyrylium Salts

CHIMIA International Journal for Chemistry ◽

10.2533/chimia.2020.857 ◽

2020 ◽

Vol 74 (11) ◽

pp. 857-865

Author(s):

Sumi Joseph ◽

Gaukhar Khassenova ◽

Olga García Mancheño

Keyword(s):

Catalytic System ◽

Heterocyclic Compounds ◽

Building Blocks ◽

Cycloaddition Reactions ◽

Pyrylium Salts ◽

The Past ◽

Enantioselective Reactions

The use of (benzo)pyrylium salts as versatile synthetic building blocks has become an attractive platform for the preparation of valuable heterocyclic compounds. Besides other numerous direct applications of (benzo)pyryliums, the intrinsic electrophilic nature of these species or the dipole character of the related oxidopyrylium derivatives have been exploited towards the development of enantioselective transformations such as nucleophilic dearomatization and cycloaddition reactions. This review aims at providing an overview on the relevant catalytic enantioselective methodologies developed in the past years, which are presented considering the involved metal- and/or organic catalytic system, as well as the type of reaction.

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