Treatment of 1-(5′-benzyloxy-4′-methoxy-2′-nitrobenzyl)-3,4-dihydroisoquinoline 2 with lithium/ammonia followed by the addition of ethanol gave a mixture of the dibenz[b,g]indolizines 3 and 4. Omission of ethanol resulted in the formation of 3 only. The dihydroisoquinoline from 3,4-dimethoxyphenylethyl amine behaved similarly.
                                    用
锂/
氨处理1-(5'-苄氧基-4'-甲氧基-2'-硝基苄基)-
3,4-二氢异喹啉2,然后加入
乙醇,得到苯并[ b,g ]
吲哚并嗪3的混合物和4。省略
乙醇仅形成3。来自3,4-二
甲氧基苯基
乙胺的二氢
异喹啉具有相似的行为。