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. Author manuscript; available in PMC: 2011 Dec 5.
Published in final edited form as: Tetrahedron. 2009 Apr 18;65(16):3096–3101. doi: 10.1016/j.tet.2008.08.055

Table 3.

Preparation of indoxyls

graphic file with name nihms105783u4.jpg
Entry Substrate Product Yield %
1 graphic file with name nihms105783t11.jpg graphic file with name nihms105783t12.jpg 92
2a graphic file with name nihms105783t13.jpg graphic file with name nihms105783t14.jpg 56
3 graphic file with name nihms105783t15.jpg graphic file with name nihms105783t16.jpg 58
4 graphic file with name nihms105783t17.jpg graphic file with name nihms105783t18.jpg 96
5b graphic file with name nihms105783t19.jpg graphic file with name nihms105783t20.jpg 48
a

1.1 equiv of HBF4•OEt2 was used in place of acid 2.

b

Reaction time: 36 h, dr 5:1, relative stereochemistry assigned by nOe correlation.