94244-65-2

Basic information

• Product Name: 8-methoxy-2,2-dimethyl-7-(2-methylpropoxy)-2H-chromene
• CAS NO: 94244-65-2
• Molecular Formula: C₁₆H₂₂O₃
• Molecular Weight: 262.3441
• Mol File: 94244-65-2.mol
• Article Data: 3

Chemical Properties

• Boiling Point: 343.7°C at 760 mmHg
• Flash Point: 115.6°C
• Density: 1.021g/cm³
• Vapor Pressure: 0.000138mmHg at 25°C
• Refractive Index: 1.504
• CAS DataBase Reference: 8-methoxy-2,2-dimethyl-7-(2-methylpropoxy)-2H-chromene(CAS DataBase Reference)
• NIST Chemistry Reference: 8-methoxy-2,2-dimethyl-7-(2-methylpropoxy)-2H-chromene(94244-65-2)
• EPA Substance Registry System: 8-methoxy-2,2-dimethyl-7-(2-methylpropoxy)-2H-chromene(94244-65-2)

Safety Data

• Hazardous Substances Data: 94244-65-2(Hazardous Substances Data)

Upstream product

• 128879-09-4 7-isobutoxy-8-methoxy-2,2-dimethyl-4-chromanone 
• 128879-19-6 8-Hydroxy-7-isobutoxy-2,2-dimethyl-chroman-4-one 
• 83923-88-0 2,3-dihydro-7,8-dihydroxy-2,2-dimethyl-4H-benzopyran-4-one 

Relevant articles and documents

Chromene derivatives and pesticidal composition comprising the same

The invention relates to a process for the preparation of chromenes of the general Formula V STR1 (wherein R1 and R2 are hydrogen, optionally halogeno substituted C1-6 alkyl or aryl; R3 and R7 stand for hydrogen, halogen or C1-6 alkyl; R4 represents C1-8 alkyl, aryl, aralkyl or a group containing a carbonyl group; R5 and R6 stand for C1-10 alkyl, aryl, amino, hydroxyalkyl, alkoxyalkenyl, alkylmercaptoalkyl, acyl, carboxy or an ester group or a halogen atom; n is 0 or 1) which comprises (a) for the preparation of compounds, in which R5 and R6 stand for different groups, reacting a compound of the general Formula I STR2 with an approximately equimolar, preferably 0.8-1.5 molar amount of a reactant of the general Formula R5 --X-related to the amount of the compound of the general Formula I (wherein R5 has the same meaning as stated above X is halogen) and reacting the O-monosubstituted compound of the general Formula III STR3 (wherein R1 -R6 and n are as stated above) obtained with a 1.1-1.5 molar amount of a compound of the general Formula III (wherein R6 and X are as stated above); or (b) for the preparation of compounds, in which R5 and R6 stand for the same group, reacting a chromanone of the general Formula I (wherein R1 -R4 and m have the meaning as stated above) with a 2-3 molar amount of a compound of the general Formula R5 --X-related to the amount of the compound of the general Formula I (wherein R5 and X are as stated above), preferably in the presence of a base, a catalyst and a solvent, and thereafter reducing the O-substituted chromanone derivative of the general Formula III thus obtained (wherein R1 -R6 and n are as stated above) and dehydrating the chromanol derivative of the general Formula IV STR4 thus obtained (wherein R1 -R6 and n are as stated above) in acidic-aqueous medium. The compounds of the general Formula V are partly new and useful for the preparation of pesticides.

Chromene derivatives useful as insecticides

The invention relates to pesticidal compositions comprising as active ingredient a compound of the general Formula I STR1 wherein R1 and R2 stand for hydrogen, optionally halogenosubstituted C1-6 alkyl or aryl; R3/su