155620-96-5

Basic information

• Product Name: 3-(benzyloxycarbonyloxy)-1-benzopyran-2-one
• CAS NO: 155620-96-5
• Molecular Weight: 296.279
• Mol File: 155620-96-5.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 3-(benzyloxycarbonyloxy)-1-benzopyran-2-one(CAS DataBase Reference)
• NIST Chemistry Reference: 3-(benzyloxycarbonyloxy)-1-benzopyran-2-one(155620-96-5)
• EPA Substance Registry System: 3-(benzyloxycarbonyloxy)-1-benzopyran-2-one(155620-96-5)

Safety Data

• Hazardous Substances Data: 155620-96-5(Hazardous Substances Data)

Upstream product

• 939-19-5 3-Hydroxy-cumarin 
• 501-53-1 benzyl chloroformate 

Relevant articles and documents

Photoinduced Molecular Transformations. Part 143. (2 + 2) Photoaddition of 3-Hydroxy-1-benzopyran-2-one, 3-Benzyloxycarbonyloxy-1-benzopyran-2-one, and their 8-Methoxy Derivatives, with Alkenes and Formation of 1,2-Disubstituted 1,2-Dihydrofurobenzopyran-4-ones by way of ...

Direct photoaddition of 3-hydroxy-1-benzopyran-2-one with 2,3-dimethylbut-2-ene in tert-butylalcohol gave tetrahydro-2a-hydroxycyclobutabenzopyran-3-one (63percent) arising from a (2 + 2) photoaddition while photoaddition of 3-(benzyloxycarbonyloxy)-1-benzopyran-2-one and its 8-methoxy derivative with cyclopentene gave 65:35 and 40:60 mixtures of cis-cisoid-cis- (65percent) and cis-transoid-cis-photoadducts (75percent).Removal of the protecting groups of these adducts by hydrogenolysis gave corresponding cis-cisoid-cis cyclobutanols (37percent and 24percent, respectively).Similar (2 + 2) photoadditions of the protected 3-hydroxy-1-bezopyran-2-one and its 8-methoxy derivative with cyclohexene gave a mixture of cis-cisoid-cis and cis-transoid-cis adducts, respectively.Removal of the protecting groups from each adduct gave 85:15 and 70:30 mixtures of the cis-cisoid-cis (86percent) and cis-transoid-cis cyclobutanols (70percent).Photolysis of the hypolidites generated in situ from these cyclobutanols induced regioselective β-scissions of the corresponding cyclobutanoxyl radicals to give furobenzopyran-4-ones (20-34percent) together with 4-(trans-2-iodocycloalkyl)-1-benzopyran-2-ones (7-25percent).The pathways leading to the formation of the products arising from the β-scission are discussed.