[CH2:1](Cl)[CH:2]=[CH2:3].[C:5](=[O:10])([O:8][CH3:9])[O:6][CH3:7].CO[C:13]1C=CC(O)=C[CH:14]=1.C(=O)=O>[Br-].C([P+](CCCC)(CCCC)CCCC)CCC>[C:5](=[O:8])([O:6][CH3:7])[O:10][CH2:1][CH:2]=[CH2:3].[C:5](=[O:10])([O:8][CH2:9][CH:13]=[CH2:14])[O:6][CH2:1][CH:2]=[CH2:3]The reaction conditions of Example 1 are substantially repeated employing allyl chloride (76.5 g, 1.0 mole), dimethyl carbonate (90.0 g, 1.0 mole), tetra-n--butylphosphonium bromide (6.78 g, 0.02 mole) and p-methoxyphenol (0.5 g, 0.004 mole) polymerization inhibitors. After heating for 7 hours at 150° C. and 600 psi carbon dioxide pressure, the reactor is cooled to room temperature and vented. Distillation gives 29.0 g (25 percent yield) of allyl methyl carbonate having b.p. of 79° C.-80° C. (150 torr) and 4.8 g (3.4 percent yield) of diallyl carbonate having b.p. of 107° C.-108° C. (150 torr).
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