133721-83-2

Upstream product

• 16075-82-4 2,3-Dihydro-2,2-dimethyl-6-phenyl-4H-pyran-4-one 
• 39082-53-6 1,1-bis(phenylsulfonyl)ethylene 
• 40485-27-6 5-Methyl-1-phenylhex-2-in-1,5-diol 
• 133721-54-7 4-Chloro-2,2-dimethyl-6-phenyl-2H-pyran 
• 100-52-7 benzaldehyde 
• 40485-33-4 5-Hydroxy-5-methylhex-2-ynophenone 
• 590-37-4 2-methylpent-4-yn-2-ol 
• 6919-61-5 N-methoxy-N-methylbenzamide 

Relevant academic research and scientific papers

A New General Synthesis of 2,2-Dialkyl-2,3-dihydro-4H-pyran-4-ones and Their Application for the in situ Preparation of Electron-Rich Dienes in Carbonyl-Alkyne Exchange Reactions with Acetylenes

The substituted 2,2-dialkyl-2,3-dihydro-4H-pyran-4-ones of type II and III have been prepared by acid-catalyzed cyclization of the corresponding substituted acetylenic ketones I in good to excellent yields (Scheme 1).These 2,2-dialkyl-2,3-dihydro-4H-pyran