Authentic Materials.-Methyl tetrahydrofuroate, a-phenyltetrahydrofuran, and a, a'- bistetrahydrofuranyl were prepared by catalytic hydrogenation of methyl furoate, g by the methods of Shima, et al.,'O and Nitsui, et al., ll respectively. Methyl formate, dimethyl oxalate, and bicyclohexyl were commercially availabel (from Wako Pure Chemical Industries, Ltd.). Photochemical Reaction of Bis (carbomethoxy) mercury in THF.-Bis (carbomethoxy) ...
