A process for the dehydrohalogenation of a 7-halo- or a 1,7-dihalodihydrocodeinone dialkyl ketal of the general formula (I): ##STR1## in which R represents an alkyl group containing from 1 to 6 carbon atoms, X represents hydrogen or chlorine or bromine and Y represents chlorine or bromine which comprises subjecting the ketal to the action of a base in the presence of a polar aprotic solvent. The process has utility in facilitating the production of codeine.
一种用于去卤代脱氢的方法,适用于一般式(I)的7-卤代或1,7-二卤代二氢
可待因二烷基醚化物:其中R代表含有1至6个碳原子的烷基基团,X代表氢、
氯或
溴,Y代表
氯或
溴。该方法包括将醚化物在极性无
水溶剂存在下暴露于碱的作用下。该方法有助于促进
可待因的生产。