Practical, efficient synthesis of N-mono-substituted β-amino tertiary thiols via reductive ring-opening of 3-thiazolines
作者:Song Xin、Zhang Dengfeng、Su Jiangtao
DOI:10.1007/s11164-012-0705-8
日期:2013.2
An efficient synthesis of N-mono-substituted β-amino tertiary thiols by reductive ring-opening of 3-thiazolines, obtained by use of the Asinger reaction, is described. This synthesis be regarded as a complementary approach for aminolytic ring-opening of thiiranes.
take part in nucleophilic aromatic substitution (SNAr) reactions is realized in a new three-component, one-pot reaction, giving at least tricyclic annulated quinazolinones, benzoxazinones, and benzothiazinones as a result of the employed nitrogen, oxygen, or sulfur nucleophiles, respectively. Especially in the case of quinazolinones, this convenient strategy enables the access to heterocycles of heightened
在新的三组分一锅法反应中,实现了易于参与的环状亚胺与酰基氯的有效转化,该亚胺能够参与亲核芳香族取代(S N Ar)反应,至少产生三环环化喹唑啉酮,苯并恶嗪酮分别是由于使用了氮,氧或硫亲核试剂而产生的苯并噻嗪酮。特别是在喹唑啉酮的情况下,这种方便的策略使人们能够进入多样性更高的杂环,这为精细杂环骨架的有效衍生化提供了发展。在随后的Heck或Ullmann环化中,可以对所提及的喹唑啉酮进行进一步的环合。
A new multicomponent reaction: unexpected formation of derivatizable cyclic α-alkoxy isothioureas
known, the heterocyclic imines 2,5-dihydro-1,3-thiazoles are convertible to bisamides with the aid of a carboxylic acid and an isocyanide (Ugi reaction). Herein, it is shown that 2,5-dihydro-1,3-thiazole S-monoxides-the respective alpha-sulfinyl imines-are characterized by an altered reaction behavior. In a hitherto unknown multicomponent reaction the alpha-sulfinyl imines react with an isocyanide
Regioselective Air Oxidation of Sulfides to<i>O,S</i>-Acetals in a Bubble Column
作者:Fabian Brockmeyer、Jürgen Martens
DOI:10.1002/cssc.201402310
日期:2014.9
In this paper the use of a bubblecolumn for a metal‐free, selective oxidation of α‐alkylthio‐imines to O,S‐acetals is presented. During the synthesis, which is straightforward to perform, the sulfides are oxidized to α‐alkoxy‐ or, respectively, α‐hydroxysulfide by adding activated carbon in the presence of atmospheric oxygen only. We show that the use of the bubblecolumn, which is unusual on laboratory