A Synthetic Method to Access Symmetric and Non-Symmetric 2-(N,N'-disubstituted)guanidinebenzothiazoles
作者:Alejandro Cruz、Itzia I. Padilla-Martínez、Efrén V. García-Báez
DOI:10.3390/molecules170910178
日期:——
Symmetric and non-symmetric 2-(N-H, N-methyl, N-ethylenyl and N-aryl)guanidinebenzothiazoles were synthesized from the reaction of ammonia, methylamine, pyrrolidine and aniline with dimethyl benzo[d]thiazol-2-yl-carbono-dithioimidate (5) as intermediate. The products were characterized by 1H-, 13C-NMR spectroscopy and three of them by X-ray diffraction analysis. HN-phenyl protons formed intramolecular hydrogen bonds that assist the stereochemistry of the second substituent, whereas the HN-alkyl protons were involved in intermolecular hydrogen bonding.
对称和非对称的2-(N-H、N-甲基、N-乙烯基和N-芳基)氨基苯并噻唑是通过氨、甲胺、哌啶和苯胺与二甲基苯并[d]噻唑-2-基-碳硫氨基亚胺(5)作为中间体反应合成的。产品通过1H-NMR、13C-NMR光谱进行了表征,其中三个产品还通过X射线衍射分析进行了鉴定。HN-芳基质子的内分子氢键形成有助于第二个取代基的立体化学,而HN-烷基质子则参与了分子间氢键的形成。