62154-12-5

Upstream product

• 7664-93-9 sulfuric acid 
• 768-60-5 4-methoxyphenylacetylen 
• 52255-88-6 4,4'-(buta-1,3-diene-2,3-diyl)bis(methoxybenzene) 
• 29338-71-4 1-bromo-1-(4-methoxyphenyl)ethene 
• 33902-36-2 3-(3-methoxyphenyl)-2-(4-methoxyphenyl)propanoic acid 
• 858229-02-4 6-hydroxy-3-methyl-2-(4-hydroxy-phenyl)-indene 
• 77-78-1 dimethyl sulfate 
• 917-64-6 methyl magnesium iodide 
• 7478-21-9 2-(4-methoxyphenyl)-5-methoxy-1-indanone 
• 32117-52-5 1-(1-(4-methoxyphenyl)ethylidene)-2-tosylhydrazine 
• 107144-81-0 2,3-bis-(4-hydroxy-phenyl)-buta-1,3-diene 

Downstream Products

• 102018-39-3 6-methoxy-2-(4-methoxy-phenyl)-3-methyl-1-methylene-indene 
• 872785-56-3 Opt_.-inakt. 5-Methoxy-1.3-dimethyl-2-(4-methoxy-phenyl)-indan 
• 858229-02-4 6-hydroxy-3-methyl-2-(4-hydroxy-phenyl)-indene 

Relevant academic research and scientific papers

Palladium-Catalyzed Tail-to-Tail Reductive Dimerization of Terminal Alkynes to 2,3-Dibranched Butadienes

The palladium-catalyzed tail-to-tail reductive dimerization of terminal alkynes is described for the first time. Aromatic terminal alkynes bearing diverse and sensitive functional groups as well as aliphatic terminal alkynes are efficiently transformed to 2,3-dibranched butadienes. The key to achieve a selective tail-to-tail reductive dimerization reaction is to control appropriately the acidity of the reaction solution, which is accomplished by a combined use of pivalic acid and para-toluenesulfonic acid. The tail-to-tail reductive dimerization reaction is proposed to proceed via a cationic alkenyl palladium intermediate under acidic conditions.

Facile synthesis of dibranched conjugated dienes via palladium-catalyzed oxidative coupling of N-tosylhydrazones

A facile and highly regioselective Pd-catalyzed oxidative coupling of N-tosylhydrazones providing efficient access to 2,3-disubstituted-1,3-butadienes has been developed. This process features readily available starting materials and mild reaction conditions. Further transformations of the obtained dibranched 1,3-dienes, through Diels-Alder reactions and indene synthesis, are also demonstrated, which reveal their great potential for synthetic utility.

Synthesis of indenes via Bronsted acid catalyzed cyclization of diaryl- and alkyl aryl-1,3-dienes

Substituted indenes can be synthesized via the Bronsted acid catalyzed cyclization of diaryl- and alkyl aryl-1,3-dienes. In this approach, treatment of symmetric or unsymmetric diaryl- and alkyl aryl-1,3-dienes with a catalytic amount of trifluoromethanesulfonic acid gives a variety of indene derivatives in good to excellent yields under mild conditions.

Synthesis of indenes via Br?nsted acid catalyzed cyclization of diaryl- and alkyl aryl-1,3-dienes

Substituted indenes can be synthesized via the Br?nsted acid catalyzed cyclization of diaryl- and alkyl aryl-1,3-dienes. In this approach, treatment of symmetric or unsymmetric diaryl- and alkyl aryl-1,3-dienes with a catalytic amount of trifluoromethanesulfonic acid gives a variety of indene derivatives in good to excellent yields under mild conditions.