Synthesis of Heterocycle-Annelated Naphthyridones with a Bridgehead Nitrogen Atom

Reaction conditions and yields

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CompoundBase
-
Reaction
time (h)
Yield
(%)
no.structure
6 KOtBu1.582
7 KOtBu364
8 KOtBu
K2CO3
2
2
85
47
9 KOtBu
K2CO3
DBU
1.5
3
3
87
47
54
10 KOtBu
K2CO3
2
3
51
58
11 KOtBu
K2CO3
2
2
78
63
12 K2CO3 286
14 K2CO3 244
15 K2CO3 237
16 KOtBu
K2CO3
DBU
2
3
2
88
75
58
17 K2CO3 264
19 K2CO3
Cs2CO3
4
3
52
55


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nh, 9 May 1996