Chemistry Reference
In-Depth Information
changed many process and manufacturing strategies regarding the storage and use
of low-boiling aliphatic isocyanates. Formerly, the Union Carbide broad spectrum
contact insecticide Sevin (N-methyl-1-naphthyl carbamate, 284) was prepared by the
addition of 1-naphthol to MIC (for the synthesis of other carbamates with iso-
cyanates, see Section 4.3.2).
O
CH
3
OH
O
N
H
CH
3
NCO
284
Table 5.1 shows examples of various classes of compounds having pesticide activity
with potential isocyanate intermediates.
Tab. 5.1.
Pesticide products with potential isocyanate intermediates.
Chemical Type
Structure
Type of Pesticide
Cl
O
O
Carbamate
Insecticide/Nematicide
N
H
O
O
S
N
NO
Carbamate
Insecticide/Nematicide
O
Cl
S
O
Urea
Insecticide
N
H
N
O
COOEt
Cl
N
Sulfonyl urea
Herbicide
SO
2
NHCONH
N
OMe
O
O
Thiocarbamate
Insecticide
N
H
S
