Table 2.
Catalyst | t (min) | Yield (%) a | Ref. | Catalyst | t (min) | Yield (%) b | Ref. |
---|---|---|---|---|---|---|---|
GII | 60 | 98 | [34] | HGIItol | 8 | >99 | [39] |
GIItol | 60 | 84 | [26] | 7-synHGII | 9 | >99 | [27] |
7-synGII | 60 | 90 | [26] | 7-antiHGII | 16 | >99 | [27] |
7-antiGII | 60 | 80 | [26] | 8-synHGII | 6 | >99 | [27] |
8-synGII | 20 | 95 | [27] | 8-antiHGII | 12 | >99 | [27] |
8-antiGII | 60 | 83 | [27] |
a Reactions conducted in CD2Cl2 (0.1 M) at 30 °C, catalyst 1 mol %; b Reactions conducted in C6D6 (0.1 M) at 60 °C, catalyst 1 mol %.