| 摘要 |
Novel 2-(2',2'-dihalovinyl)-cyclobutan-1-ones and 2-(2',240 ,2'-trihaloethyl)-cyclobutan-1-ones of the formula <IMAGE> are disclosed, wherein R1 represents -CH=CX2 or -CH2-CX3, and X in each case represents chlorine or bromine, one of R2 and R3 represents methyl and the other represents hydrogen or methyl, or R2 and R3 together represent an alkylene group having 2 to 4 carbon atoms. The invention relates also to the production and the use of the said cyclobutanones. |
