2,3,4,6-Tetramethyl-benzene-sulfonic acid → 2-Oxopentyl-2,3,4,6-tetramethylbenzene sulfonate

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Reaction Steps

A 1.0 g quantity of 1-diazo-2-pentanone is reacted with 2.3 g of 2,3,4,6-tetramethyl-benzene-sulfonic acid in 30 ml of ether until nitrogen no longer evolves. The reaction mixture is washed with water, dried and distilled in a vacuum to remove the ether. The residue is recrystallized from ethanol/water, affording 1.6 g of 2-oxopentyl-2,3,4,6-tetramethylbenzene sulfonate (Compound 95), m.p. 49° to 50° C. Yield 60.0%.

Provenance & Evidence