Abstract:
:Photolysis of 6-chloro-1,3-dimethyluracil and mesitylene in the presence of trifluoroacetic acid (TFA) at low temperature gave 1,3,5,7,9- and 1,3,6,8,10-pentamethylcyclooctapyrimidine-2,4-diones (1b, 1c). Sequential photoreaction of the former (1b) resulted in the formation of 9,11-diazapentacyclo[6.4.0.0(1,3).0(2,5).0(4,8)]dodecane-2,4-dione (2b) by way of 9-exo-methylene derivative (7b) and cyclobutaquinazoline (8b). On the other hand, UV-irradiation of 1c led to the bond shift isomer (5c) whose photolysis in the presence of TFA gave rise to the formation of the [6.4.0.0(1,3).0(2,6).0(4,8)]dodecane isomer (3c).
journal_name
Photochem Photobioljournal_title
Photochemistry and photobiologyauthors
Ohkura K,Nishijima K,Seki Kdoi
10.1562/0031-8655(2001)074<0385:eropdr>2.0.co;2subject
Has Abstractpub_date
2001-09-01 00:00:00pages
385-90issue
3eissn
0031-8655issn
1751-1097journal_volume
74pub_type
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