Preparation of alpha-pyrrolidones and their imines

Details Preparation of alpha-pyrrolidones and their imines Preparation of alpha-pyrrolidones and their imines

1989-04-25

1990-10-09

Springer, David B.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

548543, 548550, 548558, C07D20726

Patent

active

049622048

ABSTRACT:
.alpha.-Pyrrolidones and cyclic amidines 1a and 1b, respectively, for washing gases ##STR1## where R.sup.1 and R.sup.2 are each C.sub.1 -C.sub.8 -alkyl, C.sub.1 -C.sub.8 -alkoxy, C.sub.3 -C.sub.10 -cycloalkyl or C.sub.3 -C.sub.10 -cycloalkoxy or are bonded to one another to form a ring, R.sup.3 is hydrogen, C.sub.1 -C.sub.6 -alkyl, phenyl or naphthyl and R.sup.4 and R.sup.5 are each hydrogen or C.sub.1 -C.sub.4 -alkyl, are prepared by a method in which an amine II ##STR2## where R.sup.3' is hydrogen, tert-butyl, phenyl or naphthyl, is reacted with an .alpha.,.beta.-unsaturated carboxylic acid derivative III ##STR3## where X is OR', --NR'R", --NHR' or --NH.sub.2 and R' and R" are each C.sub.1 -C.sub.8 -alkyl, C.sub.3 -C.sub.8 -cycloalkyl or phenyl, or with an .alpha.,.beta.-unsaturated nitrile IV ##STR4## in the presence of a free radical initiator, and, where R.sup.3' is hydrogen and it is intended to prepare a compound in which R.sup.3' is C.sub.1 -C.sub.6 -alkyl, the product obtainable in this procedure is reacted with an alkylating agent to introduce a C.sub.1 -C.sub.6 -alkyl group.

REFERENCES:
patent: 3109848 (1963-11-01), Bortnick et al.
patent: 3121093 (1964-02-01), Bortnick et al.
patent: 3132151 (1964-05-01), Bortnick et al.
patent: 4855444 (1989-08-01), Wambach

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