Phenylureas
The phenylureas are a class of selectively effective herbicides . The active substance is mainly absorbed via the roots and the effect is based on the inhibition of photosystem II . The selectivity is due to physico-chemical factors.
The common group of phenylureas (C 8 H 7-9 N 2 O) consists of a phenyl and a methyl urea group .
| Surname | Monuron | Monolinuron | Metobromuron | Diuron | Linuron | Isoproturon (IPU) | Chlorotoluron | Chloroxuron | Buturon | Fenuron | Metoxuron | Fluometuron |
| Basic structure |
|
|||||||||||
| R 1 | -Cl | -Cl | –Br | -Cl | -Cl | -CH (CH 3 ) 2 | -CH 3 |
|
-Cl | -OCH 3 | ||
| R 2 | -H | -H | -H | -Cl | -Cl | -H | -Cl | -H | -Cl | -CF 3 | ||
| R 3 | -CH 3 | -OCH 3 | -OCH 3 | -CH 3 | -OCH 3 | -CH 3 | -CH 3 | -CH 3 | -CH (CH 3 ) C≡CH | -CH 3 | -CH 3 | -CH 3 |
| CAS number | 150-68-5 | 1746-81-2 | 3060-89-7 | 330-54-1 | 330-55-2 | 34123-59-6 | 15545-48-9 | 1982-47-4 | 3766-60-7 | 101-42-8 | 19937-59-8 | 2164-17-2 |
| PubChem | 8800 | 15629 | 18290 | 3120 | 9502 | 36679 | 27375 | 16115 | 19587 | 7560 | 29863 | 16562 |
Individual evidence
- ↑ Entry on phenylurea herbicides. In: Römpp Online . Georg Thieme Verlag, accessed on July 26, 2014.
- ↑ H.-R. Schulten: Field desorption mass spectrometry of biocides of the phenylurea, carbamate and thiocarbamate types . In: Fresenius' Journal for Analytical Chemistry . tape 293 , no. 4 , 1978, p. 273-281 , doi : 10.1007 / bf00491324 ( PDF ). Table 1 with additions