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. 2014 Dec 5;16(24):6334–6337. doi: 10.1021/ol503078h

Table 5. Scope of Indole Annulation.

graphic file with name ol-2014-03078h_0011.jpg

entry pyrrole R2 R3 R6 indole time (h) yield (%)
1 2a –H –H –H 3a 12 91
2 2b –Br –H –H 3b 12 67
3 2c –CO2Et –H –H 3c 12 62
4 2d –Ph –H –H 3d 12 87
5 2e –H –CH3 –H 3e 12 94
6 2f –H –CH2CH3 –H 3f 12 92
7 2g –H –Br –H 3g 12 75
8 4a –H –H –CH3 5a 8 88
9 4b –H –H –CH2CH3 5b 8 95
10 4c –H –H –CH2Ph 5c 8 96
11 4d –H –H –CH2CH=CH2 5d 8 93
12 4e –H –H –CH2C≡CH 5e 8 92
13 4f –H –H –CH2CO2Et 5f 8 72