2,5,5-Trimethyl-3-carbalkoxy-4(.beta.,.beta.-di halovinyl)-4,5-d

Details 2,5,5-Trimethyl-3-carbalkoxy-4(.beta.,.beta.-di halovinyl)-4,5-d 2,5,5-Trimethyl-3-carbalkoxy-4(.beta.,.beta.-di halovinyl)-4,5-d

1979-02-09

1980-04-15

Raymond, Richard

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D30732

Patent

active

041983416

ABSTRACT:
A method of preparing certain dihalogen vinyl cyclopropane carboxylic acid esters of the formula ##STR1## wherein R is an alkyl moiety and X is chlorine or bromine by exposing a dihalogen vinyl dihydrofuran of the formula ##STR2## to light, e.g., ultraviolet light. Also disclosed is a method for preparing such 2,4,4-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrof urans by reaction of a .beta.-alkoxycrotonic acid ester or 3,3-bisalkoxybutyric acid ester with a 1,1,1-trihalogen-4-methyl-3- or -4-pentene-2-ol in the presence of an acid catalyst. Also disclosed is a method of converting such 2,4,4-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrof uran by thermal rearrangement into 2,5,5-trimethyl-3-carbalkoxy-4-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrof urans. Such 2,4,4- and 2,5,5-trimethyl-3-carbalkoxy-5-(.beta.,.beta.-dihalogenvinyl)-4,5-dihydrof urans are new.

REFERENCES:
patent: 3919261 (1975-11-01), Merkle et al.

Affiliated with

Also associated with

Rating

2,5,5-Trimethyl-3-carbalkoxy-4(.beta.,.beta.-di halovinyl)-4,5-d does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with 2,5,5-Trimethyl-3-carbalkoxy-4(.beta.,.beta.-di halovinyl)-4,5-d, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and 2,5,5-Trimethyl-3-carbalkoxy-4(.beta.,.beta.-di halovinyl)-4,5-d will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-475619