Cesium p-nitrobenzoate

Cesium p-nitrobenzoate, p-NO,C6H4COOCs (1). The salt is prepared by reaction of the acid with Cs2CO, in aqueous methanol. 

D-a-Hydroxy carboxylic acids.1 These optically active acids can be prepared by a Sn2 reaction between the t-butyl esters of L-2-halo carboxylic acids and cesium p-nitrobenzoate, which proceeds with complete inversion. 

Fig. 8. Influence of photoirradiation on the binding of cesium p-nitrohenzoate to polystyrene beads. The reaction solution (7.7 ml of DMF) contains 100 mg (0.0145 mmol of crown ether) of polystyrene beadsandO.0145 mmol of cesium p-nitrobenzoate (O) 0 - 40 min in the dark and then photoirradiat-sd ( ) photoirradiated for 1 h in the absence of cesium p-nitrobenzoate and then mixed (time 0) with cesium p-nitrobenzoate in the dark...

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