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。
Modified nucleotides and methods of labeling nucleic acids
申请人:Anderson D. Jack
公开号:US20050003371A1
公开(公告)日:2005-01-06
The invention relates to functionalized nucleotides that permit the covalent linkage of the nucleotides to moieties containing reactive groups complementary to the functional group. More specifically, the invention relates to nucleotides comprising a functional group attached to the nucleobase that permits the covalent attachment of the nucleotides or a nucleic acid comprising such nucleotides to detectable moieties, polypeptides and solid supports. The invention further relates to nucleic acids comprising such functionalized nucleotides, methods of labeling nucleic acids with such nucleotides, and kits comprising such nucleotides.