| 摘要 |
<p>An alkyl-aromatic compound is selectively photochlorinated in the side chain in a cyclic reaction system wherein said compound is continuously circulated between a container (1) and photochlorination reactor (2). The compound is partially chlorinated after each passage through the photochlorination reactor (2), the number of passages depending on the degree of chlorination required. The procedure is particularly useful for the preparation of benzyl chloride, benzal chloride and benzotrichloride, and the corresponding halogen-substituted derivatives of the nucleus. <IMAGE></p> |
