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100

101

11 Experimenteller Teil

178

H-NMR (300 MHz, DMSO-d

= 11.32 (breites s, 1H, Enol), 8.51 (t, 1H, 6-NH, J =

5.9 Hz), 7.74 (

s, 1H, NH), 6.88-6.74 (m, 3H, 8-H, 9-H, 10-H), 5.96 (s, 2H, 11-H), 4.18

(d, 2H, 7-H, J = 5.9 Hz), 3.91 (

dd, 1H, 4-H, J = 2.7, 9.2 Hz), 3.41 (s, 2H, 5-H), 1.80–

1.71 (

m, 1H, 2-H), 1.51 (m, 1H, 3-H), 1.22 (m, 1H, 3-H), 0.92 (d, 3H, 1-CH

, J = 2.5

Hz), 0.88 (

d, 3H, CH

, J = 2.6 Hz) ppm.

11.4.9 Herstellung von 2-(2,5-Dihydro-4-hydroxy-5-isobutyl-2-oxo-

1H-pyrrol-3-ylthio)-N-isobutylacetamid (51)

Ausbeute: 34 mg (38%) von Tetramsäure 51 als gelbes Öl

H-NMR (300 MHz, DMSO-d

= 11.24 (breites s, 1H, Enol), 8.03 (s, 1H, 6-NH),

7.72 (

s, 1H, NH), 3.88 (dd, 1H, 4-H, J = 2.8, 9.1 Hz), 3.76 (t, 2H, 7-H, J = 6.3 Hz),

3.18 (

s, 2H, 5-H), 2.44 (td, 1H, 8-H, J = 6.7, 13.4 Hz), 1.81–1.73 (m, 1H, 2-H), 1.50

(

m, 1H, 3-H), 1.25 (m, 1H, 3-H), 0.94 (d, 3H, 1-CH

, J = 2.5 Hz), 0.89 (d, 3H, CH

, J =

2.6 Hz), 0.84 (

d, 6H, J = 6.7 Hz) ppm.

11.4.10 Herstellung von 3-(4-Fluorbenzylthio)-4-hydroxy-5-isobutyl-

1H-pyrrol-2(5H)-on (52)

HO S

1 2 ... 197 198 199 200 201 202 203 204 205 206 207 ... 332 333

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