Organic compounds -- part of the class 532-570 series – Organic compounds – Chalcogen in the nitrogen containing substituent
Patent
1984-01-16
1986-01-28
Ramsuer, Robert W.
Organic compounds -- part of the class 532-570 series
Organic compounds
Chalcogen in the nitrogen containing substituent
544162, 544357, 544402, 546186, 546191, 546229, 548146, 548215, 548524, 548566, 260239B, 26050114, C07C12300, C07D29512
Patent
active
045672571
ABSTRACT:
Disclosed is a novel class of amidinium salts having the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 when taken individually are independently selected from lower-alkyl, aralkyl and cycloalkyl, and, when taken together with the respective nitrogen atoms to which they are attached, R.sub.1 together with R.sub.2, and R.sub.3 together with R.sub.4 independently represent heterocyclic groups having 5 to 7 ring atoms, R.sub.5, R.sub.6, R.sub.7, and R.sub.8 are independently selected from hydrogen, lower-alkyl, aryl, aralkyl, and cycloalkyl.
The amidinium salts are very active catalysts for converting organic isocyanates to products containing isocyanurate and carbodiimide linkages.
REFERENCES:
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Gaetzi et al., Chemical Abstracts, vol. 83, No. 189.327e (1975).
Chemical Abstracts, vol. 94, No. 112464b (1981), Japan Kokai Tokkyo Kolo 8088053.
Advances in Organic Chemistry Methods and Results, 9, Iminium Salts in Organic Chemistry Part 2, pp. 321 et seq., 1979, John Wiley & Sons, N.Y.
Taylor et al., J. Am. Chem. Soc., 82, 3138-3141, 1960.
Taylor et al., J. Org. Chem., 28, 1108 (1963).
D. H. Clemens et al., J. Org. Chem., 29, 2932 to 2936, 1964.
Ramsuer Robert W.
Rose James S.
The Upjohn Company
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