Process for the production of skatylhydantoin

Details Process for the production of skatylhydantoin Process for the production of skatylhydantoin

1977-02-03

1978-05-16

Trousof, Natalie

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C07D40306

Patent

active

040900240

ABSTRACT:
Skatylhydantoin is prepared by hydrogenation of indolalhydantoin in the presence of a solvent and a hydrogenation catalyst wherein the solvent is a compound of the formula ##STR1## or a mixture of (I) and (II) and in which either R.sub.1 to R.sub.3 are hydrogen or R.sub.1 is hydrogen or a straight or branched chain alkyl group with 1 to 6 carbon atoms and R.sub.2 and R.sub.3 each are straight or branched chain alkyl groups with 1 to 8 carbon atoms or an aryl group, or R.sub.2 and R.sub.3 together are a straight or branched chain alkylene group with 2 to 8 carbon atoms; or one of R.sub.2 and R.sub.3 is hydrogen and R.sub.1 and R.sub.2 or R.sub.3 are joined to form a straight or branched chain alkylene group with 2 to 8 carbon atoms; and R.sub.4 to R.sub.7 each are straight or branched chain alkyl groups with 1 to 8 carbon atoms, an aryl group, an alkaryl group or an aralkyl group, or two of the substituents R.sub.4 to R.sub.7 together also are a straight or branched chain alkylene group with 2 to 8 carbon atoms, wherein the melting point of the solvent (or mixture of solvents) is below 50.degree. C and a noble metal catalyst is used as the hydrogenation catalyst.

REFERENCES:
elks et al., J. Chem. Soc. (London), 1944, pp. 629-632.
Kittila, Dimethylformamide Chemical Uses, pp. 131-133, E. I. Du Pont de Nemours & Co., Inc., 1967.
Majima et al., Berichte, 1922, vol. 22, pp. 3859-3865.
Weygand, Organic Preparations, pp. 10-15, N.Y., Interscience, 1945.

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