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7944695 
Journal Article 
Synthesis and photochemistry of 2,2-di-tert-butyl-6-(4,4-di-tert-butylbuta-1,3-dienyl)-2H-pyran 
Kilickiran, P; Sankararaman, S; Hopf, H 
2001 
1 
Indian Journal of Chemistry. Section B
ISSN: 0376-4699
EISSN: 0975-0983 
40 
9 
781-785 
English 
WOS:000171192200002 
E,E-1,1,1,9,9-tetra-tert-butylnona-1,3,6,8-tetraen-5-one 7 undergoes cyclization under both basic and acidic conditions to yield 2,2-di-ter-butyl-6-(4,4-di-tert-butylbuta-1,3-dienyl)-2H-pyran 6. Upon photolysis of the 2H-pyran derivative ring opening to the ketone is observed. The 2H-pyran derivative is fluorescent and its fluorescene quantum yield and life time have been measured in cyclohexane and acetonitrile.