I. Synthesis of methylenecyclobutane from pentaerythrityl chloride. II. The attempted synthesis of cyclobutane. III. Reinvestigation of the synthesis of spiroheptanedicarboxylic acid
I. THE SYNTHESIS OF METHYLENECYCLOBUTANE FROM PENTAERYTHRITYL CHLORIDE A new method for preparing methylenecyclobutane is described in which the starting material is pentaerythrityl tetrachloride. Pentaerythrityl chloride is dechlorinated by zinc dust in the presence of sodium iodide and sodium car...
| Summary: | I. THE SYNTHESIS OF METHYLENECYCLOBUTANE FROM PENTAERYTHRITYL CHLORIDE
A new method for preparing methylenecyclobutane is described in which the starting material is pentaerythrityl tetrachloride. Pentaerythrityl chloride is dechlorinated by zinc dust in the presence of sodium iodide and sodium carbonate, using as solvent either diethylene glycol or acetamide. Reasonable yields are obtained.
II. THE ATTEMPTED SYNTHESIS OF CYCLOBUTANONE
A synthesis of cyclobutanone through treatment of the methylenecyclobutane-nitrogen trioxide addition compound, with alcoholic potassium hydroxide is not successful.
The oxidation of methylenecyclobutane dibromide with potassium permanganate does not yield cyclobutanone.
III. A REINVESTIGATION OF THE SYNTHESIS OF SPIROHEPTANEDICARBOXYLIC ACID
An experiment is described in which two mols of malonic ester are condensed with one mol of pentaerythrityl chloride to form spiroheptanetetracarboxylic acid ester. The tetra acid is decarboxylated by heat to afford the dicarboxylic acid. The procedure is a modification of that described in the literature, whereby spiroheptanedicarboxylic acid is prepared from pentaerythrityl bromide.
A parallel experiment in which pentaerythrityl bromide is condensed with malonic ester is also described.
The yields are low in each case.
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