Process for the preparation of dichloro-(2,2)-paracyclophane

Details Process for the preparation of dichloro-(2,2)-paracyclophane Process for the preparation of dichloro-(2,2)-paracyclophane

1992-07-14

1997-10-21

Siegel, Alan

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

Organic compounds

Halogen containing

570184, 570210, 564282, 564289, C07C 2118, C07C21100

Patent

active

056798741

ABSTRACT:
Process for the preparation of dichloro-(2,2)-paracyclophane from p-methylbenzylhalide through 2(3)-chloro-p-methylbenzyltrimethylammonium halide by Hofmann elimination of 2(3)-chloro-p-methylbenzyl trimethylammonium hydroxide in an aqueous solution of alkali metal hydroxide, wherein the 2(3)-chloro-p-methylbenzyltrimethylammonium halide is prepared by chlorination of p-methylbenzyltrimethylammonium halide and the Hofmann elimination is conducted in the presence of dioxane.

REFERENCES:
patent: 4783561 (1988-11-01), Pregagha et al.
patent: 4816608 (1989-03-01), Bornengo et al.
patent: 4831199 (1989-05-01), Suzuki et al.
patent: 4849559 (1989-07-01), Lee et al.
patent: 4853488 (1989-08-01), Ungarelli et al.
Fieser et al Reagents for Organic Synthesis pp. 1109-1110 (1967).

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