68719-74-4

Basic information

• Product Name: 1,2-Dimethoxy-4-((E)-pent-1-enyl)-benzene
• Synonyms: 1,2-Dimethoxy-4-((E)-pent-1-enyl)-benzene
• CAS NO: 68719-74-4
• Molecular Weight: 206.285
• Mol File: 68719-74-4.mol
• Article Data: 3

Chemical Properties

• CAS DataBase Reference: 1,2-Dimethoxy-4-((E)-pent-1-enyl)-benzene(CAS DataBase Reference)
• NIST Chemistry Reference: 1,2-Dimethoxy-4-((E)-pent-1-enyl)-benzene(68719-74-4)
• EPA Substance Registry System: 1,2-Dimethoxy-4-((E)-pent-1-enyl)-benzene(68719-74-4)

Safety Data

• Hazardous Substances Data: 68719-74-4(Hazardous Substances Data)

Upstream product

• 120-14-9 3,4-dimethoxy-benzaldehyde 
• 1779-51-7 n-butyl(triphenyl)phosphonium bromide 

Downstream Products

• 54419-21-5 1-(3,4-dimethoxyphenyl)butan-1-one 

Relevant articles and documents

Oxocarbons and related compounds. 27. Synthesis of dihydrocyclobuta[a]naphthalene-1,2-diones and cyclobuta[a]naphthalene-1,2-diones via annulation of alkoxy-(1-alkenyl)benzenes with 3-chloro-3-cyclobutene-1,2-dione. Scope and limitations

The reaction of alkoxy-(1-alkenyl)benzenes with semisquaric chloride (3) has been investigated systematically. 1,2-Dialkoxy- and 1-alkoxy′-2-alkoxy″-4-(1-alkenyl)benzenes (6a-j) and (11a-i) react with 3 to give the 3,4-dihydrocyclobuta[a]naphthalene-1,2-diones(8a-j) and (12a-i). Treatment of the dihydrocyclobuta[a]naphthalene-1,2-diones with 1.2 equiv. bromine effects dehydrogenation and affords cyclobuta[a]naphthalene-1,2-diones(9a-e) and (13b-f). Any efforts to extend this annulation reaction to dimethoxy-(1-alkenyl)benzenes with the methoxy groups in other than the 1,2-positions, e. g. 14a, b, 16a, b have been unsuccessful. The reaction of 1,2,3-trimethoxy-4-(1-propenyl) [and 4-(1-butenyl)]-benzenes (18a) and (18b) with semisquaric chloride (3) leads to the elimination of HCl and CH3OH and gives 5,6-dimethoxy-3-methyl [and 3-ethyl]-cyclobuta[a]naphthalene-1,2-diones (20a) and (20b). The reaction pathway of this novel annulation reaction is discussed.

REACTIONS EN MILIEU HETEROGENE SOLIDE-LIQUIDE FAIBLEMENT HYDRATE: II - LA REACTION DE WITTIG DANS LES SYSTEMES CARBONATES ALCALINS/SOLVANT ORGANIQUE APROTIQUE

The use of alkaline carbonates in a slighty hydrated solid-liquid aprotic organic media allowed the synthesis of alkenes from polyfunctionnal aldehydes or activated ketones with high yield in a Z preferential stereochemistry.The reaction mechanism proposed takes in account the specific use of water on the solvation of cationic species at the solid-liquid interface to explain the Z.E alkene ratio.