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. 2010 Feb 6;66(13):2316–2321. doi: 10.1016/j.tet.2010.02.017

Table 4.

Synthesis of unsymmetrical 3,3-di(indolyl)indolin-2-ones from indoles and isatin in TMGT

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Entry R1 R2 R3 R4 Yield (%) Product
1 H H H H 5a 90
2 H H H CN 5b 88
3 H H H Br 5c 88
4 H Br Me H 5d 87
5 Me H H H 5e 91