作者:Donald E. Ames、Richard J. Ward
DOI:10.1039/p19750000534
日期:——
3-Chloro[1,4]benzodioxino[2,3-c]pyridazine was prepared from 3,4,6-trichloropyridazine and catechol and was catalytically reduced to [1,4]benzodioxino[2,3-c]pyridazine. Attempted nucleophilic displacement reactions of the chloro-compound with alkoxide ions or with amines generally cleaved the dioxin ring preferentially, though with some amines the chloro-substituent was replaced without ring cleavage
由3,4,6-三氯哒嗪和邻苯二酚制备3-氯[1,4]苯并二恶英[2,3- c ]哒嗪,并将其催化还原为[1,4]苯并二恶英[2,3- c ]哒嗪。尝试用醇盐离子或用胺进行的氯化合物的亲核取代反应通常优先裂解二恶英环,尽管对于某些胺,氯取代基被取代而不发生环裂解。[1,4]苯并二恶英[2,3- c ]哒嗪和[1,4]苯并二恶英[2,3- b ]喹喔啉的反应性较低;在用吗啉加热时,二恶英环不受攻击,但通过煮沸甲醇甲醇钠进行开环裂解。[1,4]苯并二恶英[2,3- d ]的制备描述了通过1-氯衍生物的]哒嗪。