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US 5,508,439 AGranted
Perfluoroalkanoyl aminonitriles
AssigneeAmerican Cyanamid Company
InventorVenkataraman Kameswaran
Life of this patent
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Abstract
There are provided perfluoroalkanoyl aminonitrile intermediates and their use in a facile and efficient synthesis of 2-perfluoroalkyl-3-oxazolin-5-one. Said oxazolinone is a key intermediate in the preparation of insecticidal, acaricidal and nematocidal pyrrole compounds.
Claims7
A compound having formula I ##STR17## wherein n is an integer of 1, 2, 3, 4, 5, 6, 7 or 8;
- R is ##STR18## L is hydrogen or halogen;
- M and Q are on adjacent positions and taken together with the carbon atoms to which they are attached form a ring in which MQ represents the structure
- --OCH.sub.2 O--, --OCF.sub.2 O--
- with the proviso that at least one of L, M and Q must be other than hydrogen;
- R.sub.1, R.sub.2 and R.sub.3 are each independently hydrogen, halogen, NO.sub.2, CHO or R.sub.2 and R.sub.3 may be taken together with the atoms to which they are attached to form a ring in which R.sub.2 R.sub.3 is represented by the structure ##STR19## R.sub.4, R.sub.5, R.sub.6 and R.sub.7 are each independently hydrogen, halogen, CN or NO.sub.2 ;
- and
- W is O or S.
4 more elements
Dependencies are inferred from the claim text.