CONDENSATION OF CARBONYL COMPOUNDS IN PRESENCE OF AN ORGANIC HETEROCYCLIC COMPOUND HAVING AT LEAST ONE SIX-MEMBERED RING CONTAINING THREE CONJUGATED DOUBLE BONDS AND CONTAINING BORON AS A HETERO ATOM

摘要

1,142,446. Condensation of carbonyl compounds. MOBIL OIL CORP. 6 Nov., 1967 [14 Dec., 1966 (2)], No. 50348/67. Heading C2C. Condensed carbonyl group-containing compounds are prepared by reacting a carbonyl group-containing compound with itself or with another carbonyl group-containing compound in the presence of boric acid, boric oxide, or a boron - containing heteroaromatic compound having a hydroxy group attached to boron, the heteroaromatic compound having at least one six-membered ring and having, as hetero atoms, boron and either oxygen or nitrogen, or both oxygen and nitrogen and at least one of the carbonyl group-containing compounds having two to three hydrogen atoms attached to the carbon adjacent the carbonyl group. Examples prepare 2-pentyl-2-noneral, benzalacetophenone, 1 -benzoyl-2-phenylpropene.