1042149-24-5

Basic information

• Product Name: 4-(2-chlorophenyl)-6,7-dihydro-4H-cyclopenta[b]pyran-5-one
• Synonyms: 4-(2-chlorophenyl)-6,7-dihydro-4H-cyclopenta[b]pyran-5-one
• CAS NO: 1042149-24-5
• Molecular Weight: 246.693
• Mol File: 1042149-24-5.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 4-(2-chlorophenyl)-6,7-dihydro-4H-cyclopenta[b]pyran-5-one(CAS DataBase Reference)
• NIST Chemistry Reference: 4-(2-chlorophenyl)-6,7-dihydro-4H-cyclopenta[b]pyran-5-one(1042149-24-5)
• EPA Substance Registry System: 4-(2-chlorophenyl)-6,7-dihydro-4H-cyclopenta[b]pyran-5-one(1042149-24-5)

Safety Data

• Hazardous Substances Data: 1042149-24-5(Hazardous Substances Data)

Upstream product

• 3859-41-4 1,3-cyclopentadione 
• 19115-29-8 1-(2-chlorophenyl)-2-propyn-1-ol 

Relevant articles and documents

Ruthenium/TFA-catalyzed coupling of activated secondary propargylic alcohols with cyclic 1,3-diones: Furan versus pyran ring formation

(Chemical Equation Presented) A catalytic system consisting of the 16-electron allyl-ruthenium(II) complex [Ru(η3-2-C 3H4Me)(CO)(dppf)][SbF6] (dppf = 1,1′-bis(diphenylphosphino)ferrocene) and trifluoroacetic acid (TFA) has been used to promote the coupling between secondary propargylic alcohols and cyclic 1,3-diketones. The nature of the resulting products was found to be dependent on the ring size of the dicarbonyl compound employed. Thus, whereas 6,7-dihydro-5H-benzofuran-4-ones have been selectively obtained starting from 1,3-cyclohexanediones, via furan-ring formation, the use of 1,3- cyclopentanedione leads instead to 6,7-dihydro-4H-cyclopenta[b]pyran-5-ones via a pyran-ring formation process.