Synthesis of 2-Substituted 2,3-Dihydro-1,4-benzothiazine-3-thiones via Iminophosphoranes
摘要:
2-(Substituted methylsulfanyl)anilines (5) were treated with triphenylphosphine dibromide to yield iminophosphoranes (6), whose aza-Wittig reaction with carbon disulfide gave 2-(substituted methylsulfanyl)phenyl isothiocyanates(8). Cyclization of 8 by strong bases afforded 2-substituted 2,3-dihydro-1,4-benzothiazine-3-thiones (10).
合成了亚胺基膦酸酯,通式为Ph 3 P = NC 6 H 4 SR [R = 4-C 6 H 4 NO 2(3)和CH 2 C 6 H 5(4)],结合了亚氨基膦烷基和硫醚部分,并完全表征,包括通过单晶X射线衍射技术明确确定配体(3)的固态结构。这些配体和其他相关的[R = CH 3(1),C 6 H 5(2)]与[Pt(S(CH 3)2)2 Cl 2 ]进一步反应,以在所有情况下产生非对称的CNS-Pt(II)钳形配合物[PtCl {C 6 H 4(Ph 2 P = NC 6 H ^ 4 SR- κ 3 -C,N,S)}] [R = CH 3(5),C 6 H ^ 5(6),4-C 6 H ^ 4 NO 2(7),CH 2 ç 6高5(8)]。使用常规分析技术对所有化合物进行了全面表征,并通过单晶X射线衍射实验明确确定了(5),(6)和(7)的固态结构。在体外,这些新物质的抗增殖活性进行