4542-63-6

Upstream product

• 32818-78-3 5-phenyl-pent-4-ene-2,3-dione-2-oxime 
• 4542-62-5 4,4-Dimethoxy-3-oxo-1-phenyl-1-penten 
• 108-24-7 acetic anhydride 
• 104-55-2 3-phenyl-propenal 
• 7664-93-9 sulfuric acid 
• 100-52-7 benzaldehyde 

Downstream Products

• 4542-64-7 4-phenylcyclopentane-1,2-dione 

Relevant academic research and scientific papers

Copper-Catalyzed Successive C?C bond formations on Indoles or Pyrrole: A Convergent Synthesis of Symmetric and Unsymmetric Hydroxyl Substituted N-H Carbazoles

A novel copper-catalyzed successive C?Cbond formations on indoles and pyrrole approach for the direct synthesis of hydroxyl substituted N-H carbazoles is described. The current process represents an atom-economical method for the preparation of both symmetric and unsymmetric densely substituted and hydroxyl containing N-H carbazoles from easily accessible starting materials without the need for expensive metals and harsh reaction conditions. (Figure presented.).

Switching diarylethenes reliably in both directions with visible light

A diarylethene photoswitch was covalently connected to two small triplet sensitizer moieties in a conjugated and nonconjugated fashion and the photochromic performance of the resulting compounds was investigated. In comparison with the parent diarylethene (without sensitizers) and one featuring saturated linkages, the conjugated photoswitch offers superior fatigue resistance upon visible-light excitation due to effective triplet energy transfer from the biacetyl termini to the diarylethene core. Our design makes it possible to switch diarylethenes with visible light in both directions in a highly efficient and robust fashion based on extending π-conjugation and by-product-free ring-closure via the triplet manifold. Flipping the spin: When biacetyl triplet sensitizers were linked to a dithienylethene core in a conjugated fashion, the photoswitching performance dramatically improved. This design makes it possible to switch diarylethenes with visible light in both directions in a highly efficient and robust fashion.

Cobalt(II) Chloride Catalysed Coupling of Acetic Anhydride with Aldehydes. A Novel Synthesis of Asymmetrical 1,2-Diones

Cobalt(II) chloride in acetonitrile efficiently catalyses the coupling of acetic anhydride with various aldehydes to the corresponding 1,2-diones in very high yields.