Hydrochloric Acid → HCID 20360684, compound

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Reaction Steps

Acetylene is introduced for 30 minutes into a 20°-22 °C mixture of 118 ml. of tetrahydrofuran and 16.8 g. of potassium-tert.butylate, and thereafter 22.7 g. of 4-nitro-benzophenone are added to the mixture. The introduction of acetylene is continued at 20° to 22 °C for additional 30 minutes, then the mixture is neutralized with 5 n hydrochloric acid under a nitrogen atmosphere. The organic phase is separated, dried over anhydrous sodium sulfate, and the solvent is distilled off in vacuo. 23.1 g. (91 %) of 4-nitro-α-ethynyl-benzhydrol are obtained; m.p.: 88°-89 °C.

Provenance & Evidence