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. Author manuscript; available in PMC: 2015 May 7.
Published in final edited form as: Chem Soc Rev. 2014 Mar 24;43(9):2927–2940. doi: 10.1039/c4cs00054d

Table 18.

Enantioselection allene-olefin [3+2] annulation reported by Zhang

graphic file with name nihms582344t18.jpg
entry E R1 R2 R3 yield (%) 121:122 % ee of 121
1 CO2Me Et H H 87 96 : 4 79
2 CO2iBu Et H H 88 100 : 0 93
3 CO2Et tBu H H 84 94 : 6 69
4 CO2Et Et CO2Et H 49 79
5 CO2Me Et H CO2Me 84 36