N,N-二取代的4 H -3,1-苯并噻嗪-2-胺由芳基(2-异硫氰酸根合苯基)亚甲基和仲胺的两锅合成
摘要:
已经开发了使用两锅法从芳基(2-异硫氰酸根合苯基)甲酮方便地合成N,N-二取代的4 H -3,1-苯并噻嗪-2-胺的方法。因此,用仲胺处理这些异硫氰酸根合酮得到相应的酮硫脲,使其与硼氢化钠或甲基溴化镁反应,得到1,1-二烷基-3- {2- [芳基(羟基)甲基]苯基}硫脲。或分别在一个锅中的1,1-二烷基-3- [2-(1-(芳基-1-羟乙基)苯基]硫脲。这些羟基硫脲前体的氢溴酸介导的环化作用提供了所需的4 H -3,1-苯并噻嗪-2-胺。
One-Pot Synthesis of 1,4-Dihydro-2-thioxo-2H-3,1-benzoxazine-4-acetic Acid Derivatives by the Reaction of 2-Isothiocyanatophenyl Ketones with Lithium Enolates of Acetates and Tertiary Acetamides
one‐pot synthesis of 4‐aryl‐1,4‐dihydro‐2‐thioxo‐2H‐3,1‐benzoxazine‐4‐acetic acid derivatives 2 was achieved in good yields by the reaction of aryl(2‐isothiocyanatophenyl)methanones 1 with lithium enolates of acetates and tertiary acetamides. (2E)‐1‐(2‐Isothiocyanatophenyl)‐3‐phenylprop‐2‐en‐1‐one (3) gave 1,4‐dihydro‐4‐[(1E)‐2‐phenylethenyl]‐2‐thioxo‐2H‐3,1‐benzoxazine‐4‐acetic acid derivatives4 in good
通过芳基(2-异硫氰酸根合苯基)的反应可实现高收率的一锅合成4-芳基-1,4-二氢-2-硫代氧杂2 H -3,1-苯并恶嗪-4-乙酸衍生物2甲酮1与乙酸乙烯酯和叔乙酰胺的烯醇锂。(2 E)-1-(2-异硫氰酸根合苯基)-3-苯基丙-2-烯-1-酮(3)得到1,4-二氢-4-[[(1 E)-2-苯基乙烯基] -2-硫代‐2 H ‐3,1-苯并恶嗪-4-乙酸衍生物4的收率也很高。
Method for preparing 6-phenyl-triazolo or
申请人:The Dow Chemical Company
公开号:US04237049A1
公开(公告)日:1980-12-02
Novel triazolo- or imidazo-benzotriazepines are prepared from 1,3,4-benzotriazepine-2-thiones which in turn are prepared from a 2-aminobenzophenone.
A two-step process for preparing quinazolinethiones by reacting a 2-aminobenzophenone with thiophosgene to give a 2-benzoylisothiocyanate and treating this compound with a predetermined primary amine. A series of substituted quinazolinethiones which display antidepressant and antianxiety properties also are disclosed.