Starting from 7-alkoxy-4-aminocoumarins 5,6,8,12, and 13 as key intermediates, this paper describes two different methods for the preparation of azacannabinoidal 5H[1]benzopyrano[4,3-b]pyridin-5-ones 24–27, 38, and 39 containing typical structural requirements for ZNS activity. First, Michael addition of 6 and 8 to the double bonds of alkyl vinyl ketones 14 and 15 resulted in a mixture of tetrahydropyridines
从7-烷氧基-4-
氨基
香豆素5,6,8,12和13为关键中间体开始,本文描述了两种制备氮杂
大麻素5 H [1]苯并
吡喃并[4,3 - b ]
吡啶5的方法。 -酮24-27,38和39包含用于ZNS活性典型结构要求。首先,在烷基
乙烯基酮14和15的双键上加成6和8,得到四氢
吡啶24-27和稠合
吡啶20-23的混合物,后者被
氰基硼氢化钠还原而得到目标化合物24–27。第二,
吡啶环的封闭是通过Vilsmeier乙酰化和甲酰化的结合来完成的,从而产生稠合的4-
氯吡啶31-33,然后还原。