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US 4,078,077 AGranted
Cyclodiene insecticides
AssigneeNational Research Development Corporation
InventorGerald Thomas Brooks
Life of this patent
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Abstract
Analogues and derivatives of dieldrin and dihydroaldrin containing a reduced number of chlorine atoms, and hence improved biodegradability, have the formula ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 and H or Cl at least one of them being H, and the oxygen bridge is 5:8, 6:7, or 7:8, or both 5:8 and 6:7.
Claims12
A compound of the class represented by the formulas:
- ##STR3## wherein each of R.sub.1, R.sub.2 and R.sub.3 is hydrogen or chloro, at least one being hydrogen and wherein R.sub.1 is syn with respect to the double bond.
Dependencies are inferred from the claim text.