Organic compounds -- part of the class 532-570 series – Organic compounds – Nitrogen attached directly or indirectly to the purine ring...
Patent
1989-11-20
1992-04-21
Ford, John M.
Organic compounds -- part of the class 532-570 series
Organic compounds
Nitrogen attached directly or indirectly to the purine ring...
C07D23926
Patent
active
051069750
ABSTRACT:
When a phenol having substituents in at least the 2- and 4-positions but having a hydrogen atom in the 6-position, or a phenol having substituents in at least the 2- and 6-positions but having a hydrogen atom in the 4-position is reacted with formaldehyde and 1,3-propanediamine, a unique insertion-condensation reaction occurs whereby the product is a hexahydropyrimidine derivative which may be represented by the general formula ##STR1## wherein R.sub.1 is (i) a 2-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions or (ii) a 4-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions; and R.sub.2 is (i) a 2-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions or (ii) a 4-hydroxybenzyl group having an inert substituent (preferably a hydrocarbyl substituent) in at least the 3- and 5-positions or (iii) a hydrogen atom. Uses for such compounds include their use as antioxidants and stabilizers for various substrates, such as fuels, lubricants, and functional fluids.
REFERENCES:
patent: 3988367 (1976-10-01), Gaudette et al.
Crook et al., Chemical Abstracts, vol. 83, entry 180306z (1975).
Billman et al., J. Med. Chem., vol. 9, pp. 347-351 (1966).
Billman et al., Chemical Abstracts, vol. 64, entry 17590b (1966).
Bostick John G.
Cunningham Lawrence J.
Hanlon J. Vincent
Malfer Dennis J.
Ethyl Petroleum Additives Inc.
Ford John M.
LaRose David E.
Sieberth J. F.
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