| 摘要 |
PCT No. PCT/GB93/01592 Sec. 371 Date Feb. 9, 1995 Sec. 102(e) Date Feb. 9, 1995 PCT Filed Jul. 28, 1993 PCT Pub. No. WO94/05620 PCT Pub. Date Mar. 17, 1994.Process for preparing the (E)-isomer of a compound (II) by contacting the (E) or (Z) isomer of the 2-methylphenyl precursor, or a mixture of both, with bromine in an organic solvent, in the presence of a polymeric base and light. <IMAGE> (II)
|
