N
X
C
O
N
S
Hal
Solvents
Natural
Products
P Si
C
C
C C
C
C
162
4 13 C NMR
162
4 13 C NMR
1,4-Dioxane-d 8
Acetic acid-d 4
Ethanol-d 6
Methanol-d 1
Methanol-d 4
Nitrobenzene-d 5
2001
80
1601
40
1201
00
80
60
40
20
0
66.5
67
66
2001
80
1601
40
1201
00
80
60
40
20
0
20.1
178.5
179 178
20
21
19
2001
80
1601
40
1201
00
80
60
40
20
0
56.8
17.3
18
17
2001
80
1601
40
1201
00
80
60
40
20
0
50
49
51
2001
80
1601
40
1201
00
80
60
40
20
0
49
48
50
2001
80
1601
40
1201
00
80
60
40
20
0
123.5
129.6
134.9
148.6
124 123
49.9
49.0
130 129
1351 34
136
149 148
57
58
56