We report a record-high
SO2 adsorption capacity of 12.3
mmol g–1 in a robust porous material, MFM-601, at
298 K and 1.0 bar. SO2 adsorption in MFM-601 is fully reversible
and highly selective over CO2 and N2. The binding
domains for adsorbed SO2 and CO2 molecules in
MFM-601 have been determined by in situ synchrotron
X-ray diffraction experiments, giving insights at the molecular level
to the basis of the observed high selectivity.
a b s t r a c tA synthesis of the naturally occurring xanthone toxyloxanthone B is described, in which the key step is the regioselective addition of a methyl salicylate to a substituted benzyne, followed by cyclization of the intermediate aryl anion to form the xanthone, the regiochemistry of the aryne addition being confirmed by X-ray crystallography. Subsequent introduction of the pyran ring by [3,3]-rearrangement and deprotection completed the synthesis.
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