Compounds of formula II ##SPC1## and its phthalimide derivative III: ##SPC2## wherein R.sub.0 and R.sub.1 are hydrogen or alkyl of 1 to 3 carbon atoms, inclusive; wherein R.sub.2 is hydrogen, chloro, fluoro, or trifluoromethyl; wherein R.sub.3 is hydrogen, or fluoro with the proviso that R.sub.3 is not fluoro, if R.sub.2 is chloro or trifluoromethyl; and wherein R.sub.4 is hydrogen, fluoro, chloro, bromo, nitro, or trifluoromethyl are prepared by reacting a compound of formula I: ##SPC3## wherein R.sub.0, R.sub.1, R.sub.2, R.sub.3, and R.sub.4 are defined as above, with formaldehyde to produce compound II and reacting II with phthalimide, triphenylphosphine and finally diethyl azodicarboxylate to give compound III. Compounds II and III are useful as important intermediates for the production of known 6-phenyl-4H-imidazo[1,2-a][1,4]benzodiazepine which compounds are active as tranquilizers and antianxiety agents.
化合物II的
化学式为##
SPC1##及其邻苯二甲
酰亚胺衍
生物III的
化学式为##
SPC2##其中R.sub.0和R.sub.1为氢或含1至3个碳原子的烷基;其中R.sub.2为氢、
氯、
氟或三
氟甲基;其中R.sub.3为氢或
氟,但如果R.sub.2为
氯或三
氟甲基,则R.sub.3不是
氟;其中R.sub.4为氢、
氟、
氯、
溴、硝基或三
氟甲基,通过将化合物I:##
SPC3##其中R.sub.0、R.sub.1、R.sub.2、R.sub.3和R.sub.4如上所定义,与
甲醛反应制备化合物II,然后将II与邻苯二甲
酰亚胺、
三苯基膦和最后的
二乙基叠氮二
羧酸酯反应制备化合物III。化合物II和III可用作已知的6-苯基-
4H-咪唑并[1,2-a][1,4]苯并二氮杂
环己烷的重要中间体,这些化合物作为镇静剂和抗焦虑剂具有活性。