Entry Substrate Oxidant (equivalent) H2SO4 (%) Time (min) Product Yield
1 1a SbCl5 (2.5) 0.0 30 2a 78
2 1a SbCl5 (2.5) 0.3 30 2a 70
3 1a SbCl5 (2.5) 0.0 180 2a 70
4 1a SbCl5 (3.2) 0.0 30 2a 50
5 1b SbCl5 (2.5) 0.0 30 2b 55
6 1c SbCl5 (2.5) 0.0 30 2c 59
7 3 + 4 SbCl5 (2.5) 0.0 30 5 25
8 1a FeCl3 (2.5) 0.3 30 2a 65
9 1a MoCl5 (2.5) 0.3 30 2a 74
10 1a VOCl3 (2.5) 0.3 30 2a 81
Table 1: Preparation of hexaalkoxy-TPs using SbCl5 in CH2Cl2 solution.