Organic compounds -- part of the class 532-570 series – Organic compounds – Four or more ring nitrogens in the bicyclo ring system
Patent
1988-01-19
1989-10-03
Shah, Mukund J.
Organic compounds -- part of the class 532-570 series
Organic compounds
Four or more ring nitrogens in the bicyclo ring system
544242, 544237, 544336, 544276, 544283, 544353, 546176, 546329, 548342, 548378, C07D21338, C07D21512, C07D23926, C07D24112
Patent
active
048718483
ABSTRACT:
Novel compositions are prepared by reacting hydrocarbyl substituted nitrogen-containing aromatic heterocyclic compounds such as 2,5-dimethylpyridine or 2,4,6-collidine, an aldehyde such as formaldehyde, or a ketone such as acetone, or mixtures thereof and an amine having a combined total of at least seven carbon, nitrogen, oxygen or sulfur atoms and at least one reactive amine hydrogen atom such as 1-dodecanamine in the presence of a suitable catalyst such as hydrogen chloride. These novel compositions, as well as their free amine forms are useful as oil and gas well corrosion inhibitors.
REFERENCES:
patent: 3308133 (1967-03-01), Van der Burg
patent: 4676834 (1987-06-01), Treybig
patent: 4724003 (1988-02-01), Treybig et al.
Linder, et al., "The Mannich Reaction on 2,5-Dimethylpyrazine", J. Am. Chem. Soc., vol. 74, pp. 1517-1518 (03/20/52).
Wiley, "Pyrazine, Quinoxaline and Tetrahydroquinoxaline Derivatives", J. Am. Chem. Soc., vol. 76, pp. 4924-4925 (10/05/54).
Martinez Robert G.
Treybig Duane S.
Rivers Diana G.
Shah Mukund J.
The Dow Chemical Company
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