2 Or 3-tetradecenyl and poly isobutenyl substituted n-alkyl and

Organic compounds -- part of the class 532-570 series – Organic compounds – Heterocyclic carbon compounds containing a hetero ring...

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549295, 549326, C07D20712

Patent

active

044737009

ABSTRACT:
Disclosed are isomeric polyisobutenyl butyrolactones and lactams thereof useful as dispersants in lubricant oils and having the formulas: ##STR1## wherein R is a hydrocarbyl group having from 12 to 300 carbon atoms; X is O or >N--R', where R' is an alkyl or alkylamino group having from 1 to 20 carbon atoms and from 0 to 10 nitrogen atoms. The butyrolactones are made by mild reduction of the corresponding cyclic anhydrides and the lactams are prepared by reacting the intermediate butyrolactones with at least a molar equivalent of a primary amine, optionally, in the presence of a base or an acid.

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