H. Wamhoff et al., Reactions of uracils, 24. Multiple anellation to uracils and their analogsan approach to nevirapine-type tricycles, SYN COMMUN, 29(22), 1999, pp. 3919-3937
Starting with 6-amino-1,3-dimethyluracil 1 a structural analog of the NNRTI
Nevirapine 16 is synthesized in a sequence of two ring anellations and a B
eckmann rearrangement. The anellation behavior of 3 is studied in general l
eading to the anellated systems 5, 7a-c, 12,a-c.