Patent ID: 6875876

Claim:
A compound of the formula: wherein: M is an alkali metal selected from the group consisting of lithium, sodium and potassium; Z is a branched or straight chain hydrocarbon connecting group which contains 3-25 carbon atoms, optionally substituted with aryl or substituted aryl; Q is a saturated or unsaturated hydrocarbyl group derived by the incorporation of one or more unsaturated organic compounds into the M—Z linkage; n is from 0 to 5; R 1 is selected from the group consisting of aralkyl, allyl, and tertiary alkyl; and R 2 is the same as R 1 , or when R 1 is benzyl R 2 is different from R 1 and selected from the group consisting of alkyl, substituted alkyl, alkoxy, substituted alkoxy, aryl, substituted aryl, heteroaryl, substituted heteroaryl, cycloalkyl, substituted cycloalkyl, heterocycloalkyl, and substituted heterocycloalkyl, with the proviso that when R 2 is not the same as R 1 , then R 2 is more stable under conditions used to remove R 1 , or R 1 and R 2 together with the nitrogen atom to which they are attached form wherein y is from 1 to 4 and each R 11 is independently selected from the group consisting of hydrogen, alkyl, substituted alkyl, aryl, substituted aryl, cycloalkyl, substituted cycloalkyl, alkoxy, substituted alkoxy, heteroaryl, substituted heteroaryl, heterocycloalkyl, and substituted heterocycloalkyl.