| 摘要 |
Process for the preparation of (2,2)-paracyclophane or derivatives thereof by the Hofmann elimination of p-methyl-benzyl-trimethylammonium hydroxide or derivatives thereof, in an aqueous solution of an alkali metal hydroxide, wherein said elimination is carried out in the presence of a compound of the formula (I): (R)m- A - (X)n (I) wherein A represents an aromatic group, X an electron donor group, R hydrogen or an alkyl group containing from 1 to 4 carbon atoms, n is an integer comprised between 1 and 6 and m is zero or an integer comprised between 1 and a value such that the sum m+n be equal to the number of substituable positions in the aromatic group. |
