Cycloaddition of epoxides with atmospheric CO2 under solvent-free conditions using Zn-based metal–organic frameworks as catalysts.
| Entry | Catalyst | Conditions | NEa | Yield (%) | |
|---|---|---|---|---|---|
| Average | Range | ||||
| 1 | [Zn2(TCA)(BIB)2.5]·(NO3)b | TBAB (1 mol%), 80 °C, 4 h | 5 | 81.5 | 51–99 |
| 3 | [(PS-anthra)Zn(Cl)(H2O)]c | TBAB (5 mol%), r.t., 6 h | 6 | 94 | 89–97 |
| 4 | [Zn4Tb3L4]d | TBAB (5 mol%), r.t., 48 h | 7 | 74.5 | 21–96 |
| 5 | [Zn(BDC)(L)]e | TBAB (1.8 mol%), r.t., 8 h | 6 | 70 | 14–99 |
a
Number of examples.
b
H3TCA = tricarboxytriphenyl amine, BIB = 1,3-bis(imidazol-1-ylmethyl)benzene.
c
PS = polystyrene, anthra = anthranilic acid.
d
PS = polystyrene, anthra: anthranilic acid.
e
L = 4-pyridyl carboxaldehyde isonicotinoyl hydrazone; H2BDC = benzene-1,4-dicarboxylic acid.