Spontaneous cyclization of (acridin-9-ylmethyl)thioureas to spiro [dihydroacridine-9′(10′H),5-imidazolidine]-2-thiones, a novel type of acridine spirocycles
作者:Mária Vilková、Marianna Prokaiová、Ján Imrich
DOI:10.1016/j.tet.2013.12.001
日期:2014.1
Novel acridine spirocompounds, spiro[dihydroacridine-9′(10′H),5-imidazolidine]-2-thiones have been prepared by the spontaneous cyclization of 1-substituted 3-(acridin-9-ylmethyl)thioureas, which were obtained from 1-(acridin-9-yl)methanamine, N-(acridin-9-ylmethyl)propan-1-amine, and N-(acridin-9-ylmethyl)benzylamine and alkyl/aryl isothiocyanates, as continuation of our previous studies on new acridine
新颖吖spirocompounds,螺[二氢吖-9'(10' ħ),5-咪唑烷] -2-硫酮制备了由取代的1 3-(吖啶-9-基甲基)硫脲,从其中获得的自发环化1-(acridin-9-基)甲胺,N-(acridin-9-基甲基)丙-1-胺和N-(acridin-9-ylmethyl)苄胺和烷基/芳基异硫氰酸酯,作为我们先前对新a啶螺环的研究的延续。随后将由此获得的咪唑烷-2-硫酮用异腈腈转化成咪唑烷-2-一类似物,其中一些类似物部分地重新打开为相应的(ac啶9-9-基甲基)脲。对于具有两个a啶环的3-(acridin-9-基甲基)-1-(acridin-9-基)硫脲,发现了通过CH碳负离子而不是N-1氮的不寻常的螺环化。螺环1、3和4位置的结构修饰以及1 H,13 C和15N NMR光谱和X射线晶体学已被用来合理化各种9-取代的cr啶的易于发生螺环化的普遍倾向。