Photohalogenation of lactams and certain products thereof
AssigneeChevron Research Company
InventorSam Kwon Choi
Life of this patent
Estimating the term…
Abstract
As new compositions of matter, a halogenated lactam of the formula: ##EQU1## and a complex of a Lewis acid of the formula MX.sub.a and said halogenated lactam, wherein m is 2 or 3; n is 5 to 11; M is a metal of Group IIIA, IVA, VA, VIA or IVB of the Periodic Table; a is the valence of M; and X and X' are independently chlorine or bromine. The Lewis acid-halogenated lactam complex is used as a polymerization activator in the polymerization of 2-pyrrolidone. The halogenated lactam is formed by halogenating the desired lactam, and the Lewis acid-halogenated lactam complex is formed by reacting the desired halogenated lactam with said Lewis acid of the formula MX.sub.a.
Claims8
A method of making a compound of the formula:
- ##EQU12## which comprises contacting a solution of a lactam of the formula:
- ##EQU13## in an organic solvent with a hologenating agent selected from the group consisting of chlorine gas or liquid bromine in the presence of ultraviolet light, wherein m is 2 or 3, n is 5 to 11 and X' is chlorine or bromine.
A compound of the formula:
- ##EQU16## wherein m is 2 or 3;
- and
- X' is chlorine or bromine.
Dependencies are inferred from the claim text.