133321-75-2

Upstream product

• 201230-82-2 carbon monoxide 
• 125403-36-3 methyl-2-methyl-2-(4-methylphenyl)-pent-4-enoate 
• 62083-22-1 2-methyl-2-(4-methylphenyl)-pent-4-en-1-al 
• 133283-83-7 1-bromo-4-methyl-4-(4-methylphenyl)-hex-5-yn-2-ol 
• 133283-84-8 4-methyl-4-(4-methylphenyl)-3-methylenecyclopentanol acetate 
• 125403-42-1 2-methyl-2-(4-methylphenyl)-pent-4-en-1-ol 
• 79443-97-3 methyl 2-(4-methylphenyl)propanoate 
• 31007-03-1 3-oxa-β-cuparenone 
• 133283-86-0 3-Methyl-4-methylene-3-p-tolyl-cyclopentanol 

Relevant academic research and scientific papers

Rhodium-catalyzed carbonylation of spiropentanes

Spiropentanes undergo carbonylation under an atmosphere of carbon monoxide in the presence of a rhodium(I)-phosphine catalyst, giving 3-methylcyclopent-2-enones. The catalytic cycle involves two mechanistically different carbon-carbon cleavage processes.

Radical cyclization strategies to terpenoids; syntheses of (±)-β-cuparenone, (±)-laurene and epilaurenes

Radical cyclization of the bromide 8, obtained in 5 steps from the ketone 9, furnished exclusively 14 via 6-endo frig cyclization with out any observable amount of 5-exo trig product 1. 5-Exo dig radical cyclization of the bromo acetate 23, prepared from

Synthesis of (+/-)-β-cuparenone via 3-oxa-β-cuparenone

Grignard reaction followed by ozonolysis, or ozonolysis followed by Grignard reaction on the pentanoate 8, generates the diol 9.Cyclodehydration of 9 leads to the 3-oxacuparene (6), whereas PCC oxidation furnishes the 3-oxa-β-cuparenone (7).Methanesulfoni