86260-40-4

Basic information

• Product Name: 1,5,6-Tri-tert-butyl-3,3-diphenyl-2-oxabicyclo<2.2.0>hex-5-en-4-carbonsaeure-tert-butylester
• Synonyms: 1,5,6-Tri-tert-butyl-3,3-diphenyl-2-oxabicyclo<2.2.0>hex-5-en-4-carbonsaeure-tert-butylester
• CAS NO: 86260-40-4
• Molecular Weight: 502.737
• Mol File: 86260-40-4.mol
• Article Data: 1

Chemical Properties

• CAS DataBase Reference: 1,5,6-Tri-tert-butyl-3,3-diphenyl-2-oxabicyclo<2.2.0>hex-5-en-4-carbonsaeure-tert-butylester(CAS DataBase Reference)
• NIST Chemistry Reference: 1,5,6-Tri-tert-butyl-3,3-diphenyl-2-oxabicyclo<2.2.0>hex-5-en-4-carbonsaeure-tert-butylester(86260-40-4)
• EPA Substance Registry System: 1,5,6-Tri-tert-butyl-3,3-diphenyl-2-oxabicyclo<2.2.0>hex-5-en-4-carbonsaeure-tert-butylester(86260-40-4)

Safety Data

• Hazardous Substances Data: 86260-40-4(Hazardous Substances Data)

Upstream product

• 107300-44-7 3,4-Di-tert-butyl-2-(diphenylmethylen)-6,6-dimethyl-5-oxo-3-heptensaeure-tert-butylester 
• 83747-01-7 Diazo(1,2,3-tri-tert-butyl-2-cyclopropen-1-yl)essigsaeure-tert-butylester 
• 119-61-9 benzophenone 
• 83747-03-9 2,3,4-Tri-tert-butylcyclobutadien-1-carbonsaeure-tert-butylester 

Downstream Products

• 86260-41-5 1,2,6-Tri-tert-butyl-4,4-diphenyl-3-oxatricyclo<3.1.0.0^2,6>hexan-5-carbonsaeure-tert-butylester 
• 86260-41-5 oxatricyclo<3.1.0.0^2,6>hexane 

Relevant articles and documents

Syntheses with Cyclobutadienes, 19. - Ring Opening of Bi- and Tricyclic Adducts of Carbonyl Compounds onto a Kinetically Stabilized Cyclobutadiene

Benzophenone (6) adds photochemically onto the cyclobutadiene 5b to give the oxabicyclohexene 7 which is in equilibrium with the oxatricyclohexane 8 in acidic medium.The reaction of fluorenone (11) with 5b is comparable (formation of 12 and 13) but the bicyclic compound undergoes spontaneous ring opening reaction to the 1,3-diene 14.The latter one isomerizes photochemically by electrocyclic ring closure to the cyclobutene 15; this process is reversible thermally.The cyclopropenone 16 only reacts slowly at room temperature with 5b; instead of the primary adduct 17 the isomeric trifulvene 18 is isolated.Under the influence of trifluoroacetic acid the oxabicyclohexenes (7->19,21a,c,d->22a,c,d) as well as the oxatricyclohexanes (8->19, 13->14) undergoing ring opening reactions to the corresponding 1,3-dienes.Crystal structure analyses have been performed for 18 and 22a.