Formation of a spiro compound via coupling of a cyclopentadienyl ligand with a diene moiety of titanacyclopentadiene

2017 ◽  
Vol 46 (47) ◽  
pp. 16408-16411 ◽  
Author(s):  
Masayoshi Bando ◽  
Yuki Mizukami ◽  
Kiyohiko Nakajima ◽  
Zhiyi Song ◽  
Tamotsu Takahashi
Keyword(s):  
Spiro Compounds ◽  
Spiro Compound ◽  
Cyclopentadienyl Ligand

The treatment of titanacyclopentadienes with bismuth(iii) chloride gave spiro compounds in moderate yields.

Hosoya polynomials of general spiro hexagonal chains

Filomat ◽  
2014 ◽  
Vol 28 (1) ◽  
pp. 211-215 ◽  
Author(s):  
Xianyong Li ◽  
Xiaofan Yang ◽  
Guoping Wang ◽  
Rongwei Hu
Keyword(s):  
Organic Chemistry ◽  
Benzene Ring ◽  
Spiro Compounds

Spiro hexagonal chains are a subclass of spiro compounds which are an important subclass of Cycloalkynes in Organic Chemistry. This paper addresses general spiro hexagonal chains in which every hexagon represents a benzene ring, and establishes the formulae for computing the Hosoya polynomials of general spiro hexagonal chains.

Cyclization of 2-(2-bromoethoxy)-acetophenones and 5-(ω-haloalkoxy)-1,5-dihydro-2H-pyrrol-2-ones – Formation of five- to eight-membered oxygen-containing heterocycles via intramolecular alkylation

2004 ◽  
Vol 82 (5) ◽  
pp. 571-578 ◽  
Author(s):  
Kirill V Nikitin ◽  
Nonna P Andryukhova
Keyword(s):  
Sodium Hydride ◽  
Spiro Compounds ◽  
Lithium Diisopropylamide ◽  
Intramolecular Alkylation ◽  
High Yields

Under basic conditions (lithium diisopropylamide or sodium hydride in THF) 2-(2-bromoethoxy)-acetophenones were transformed to 3,4-dihydro[1]benzoxepin-5(2H)-ones (homochromanones) in high yields. The preparation of novel tetrahydropyrano[2,3-b]pyrrol-6(2H)-ones and 3,4-dihydro-2H-pyrrolo[2,1-b][1,3]oxazin-6(8aH)-ones and spiro compounds was performed using similar cyclization in moderate to good yields.Key words: cyclization, lithiation, spiro heterocycles.

Synthesis of Imidazole Spiro Compounds From 5-Alkoxycarbonyl-1H-Pyrrole-2,3-Diones and Phenylurea

2016 ◽  
Vol 52 (7) ◽  
pp. 467-472 ◽  
Author(s):  
Aleksei Yu. Dubovtsev ◽  
Ekaterina S. Denislamova ◽  
Pavel S. Silaichev ◽  
Maksim V. Dmitriev ◽  
Andrey N. Maslivets
Keyword(s):  
Spiro Compounds
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