Formaldehyde → HCID 18980983, compound

Participants

Reaction Steps

To 10 g (44 mmole) of 2-propoxy-4'-chloropropiophenone (Example 96c) in 10 g of pyridine was added 1.7 g (57 mmole) of paraformaldehyde and 0.4 g of a 40% methanolic solution of benzyltrimethylammonium hydroxide (Triton® B). After warming at 70° C. for two hours an additional 1.0 g of paraformaldehyde and 1.0 g of triethylamine was added. After heating for an additional two hours the mixture was partitioned between diethyl ether and dilute aqueous hydrochloric acid. The organic layer was washed with brine, dried over anhydrous magnesium sulfate, and concentrated in vacuo to yield 11 g of the crude title compound mixed with starting material.

Provenance & Evidence