Preparation of indenes

Patent · Tue Jun 30 04:00:00 EDT 1987

OSTI ID:6085810

Pederson, S E; Pfingsten, L L

This patent describes a process for the synthesis of indene and substituted indenes by the catalytic reaction of a substrate substituted and unsubstituted 3-phenylpropionaldehdes and 3-phenylpropylketones, according to the equation: no R group contains ethylenic or acetylenic unsaturation; the R group attached to the carbonyl group is selected from H and hydrocarbyl and each of the remaining R groups is selected independently from hydrogen, halo, nitro, trihalomethyl, acyl, acyloxy, acylthio, lower alkyl secondary amino where each alkyl has 1-4 C atoms, and hydrocarbyl, hydrocarbyloxy and hydrocarbylthio having 1-10 C atoms; hydrocarbyl ring(s) can be formed from one or more adjacent pairs of R groups on the benzene ring; and one of the R groups attached to the benzylic carbon can form a hydrocarbyl ring with the R group attached to the ortho position. The cyclodehydration is effected by passing the starting material aldehyde or ketone in the vapor phase over a solid catalyst which comprise phosphoric acid on a solid inorganic oxide support.

• Assignee: Standard Oil Co., Cleveland, OH
• Patent Number(s): US 4677238
• OSTI ID: 6085810
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
ACETYLENE
ACYL RADICALS
ALDEHYDES
ALKENES
ALKYL RADICALS
ALKYNES
AROMATICS
BENZENE
CARBONYL RADICALS
CATALYST SUPPORTS
CATALYSTS
CHALCOGENIDES
CHEMICAL PREPARATION
CONDENSED AROMATICS
ELEMENTS
ETHYLENE
FLUIDS
GASES
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
INDENE
INORGANIC ACIDS
KETONES
METHYL RADICALS
NONMETALS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHOSPHORIC ACID
RADICALS
SUBSTRATES
SYNTHESIS
VAPORS