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US 4,308,391 AGranted
2-Amino-4-substituted-thiazolecarboxylic acids and their derivatives
AssigneeMonsanto Company
InventorsRobert K. Howe, Len F. Lee
Life of this patent
Estimating the term…
Abstract
2-Amino-4-substituted-5-thiazolecarboxylic acids and derivatives thereof, are intermediates for the preparation of 2-substituted-4-substituted-5-thiazolecarboxylic acid derivatives which are herbicidal safeners.
Claims8
A compound of the formula ##STR9## wherein n is zero or one;
- R is alkyl having 3 to 9 carbon atoms, cycloalkyl having 3 to 8 carbon atoms, halo(lower)alkyl, or ##STR10## X and Y independently equal hydrogen;
- halogen, trifluoromethyl or lower alkyl;
- when n is one R.sup.1 is hydrogen, alkyl having 1 to 10 carbon atoms, lower alkenyl, lower alkynyl, lower alkoxy lower alkyl, halo(lower)alkyl, benzyl, phenyl or phenyl substituted by one to two halogen, lower alkyl or trifluoromethyl moieties;
- when n is zero R.sup.1 is --NR.sub.2 R.sub.3 where R.sub.2 and R.sub.3 independently equal lower alkyl;
- provided that when n is one and R.sup.1 is hydrogen, X and Y cannot both equal hydrogen;
- further provided that when n is one and R.sup.1 is alkyl containing 1 to 10 carbon atoms or benzyl, R cannot equal trifluoromethyl.
3 more elements
Dependencies are inferred from the claim text.