A novel three-component reaction between isocyanides, alcohols or thiols and elemental sulfur: a mild, catalyst-free approach towards <i>O</i>-thiocarbamates and dithiocarbamates
作者:András György Németh、György Miklós Keserű、Péter Ábrányi-Balogh
DOI:10.3762/bjoc.15.155
日期:——
new multicomponent reaction has been developed between isocyanides, sulfur and alcohols or thiols under mild reaction conditions to afford O-thiocarbamates and dithiocarbamates in moderate to good yields. The one-potreaction cascade involves the formation of an isothiocyanate intermediate, thus a catalyst-free synthesis of isothiocyanates, as valuable building blocks from isocyanides and sulfur is proposed
An effective method is described to construct C–S/S–S bond starting from O‐alkyl phenylcarbamothioates, giving diverse O‐alkyl S‐phenyl phenylcarbonimidothioates or isothiourea disulfides, by using Cu2O as catalyst in water (without phase‐transfer catalyst) or NiBr2 catalyst at room temperature, respectively, in transformations featuring easy control, environmental friendliness, and good to excellent
A series of sulfenamides was obtained smoothly from aryl thioureas and amines (mainly secondaryamines) through cross dehydrogenativecoupling reaction (CDC) in the presence of phenyliodine(III) diacetate. The protocol features easily available starting materials, easy and odorless performance, mild reaction conditions, good yields, and a broad substrate scope, illustrating its synthetic value for
An Efficient Synthesis of Thioesters Starting from
<i>N</i>
‐Arylthiocarbamates and Indoles: A Newman‐Kwart‐Type Rearrangement
作者:Zhi‐Chao Hu、Jing‐Jing Cui、Zhi‐Bing Dong
DOI:10.1002/ejoc.202201075
日期:2022.11.11
In the presence of PhICl2, a series of thioester compounds containing indole structures were obtained startingfrom indoles and the masked thiols (N-arylthiocarbamates). This method has the advantage of easily available startingmaterial, metal and base-free, simple operation, mild reaction conditions, and produces good yields.
Using phenyliodine diacetate as an oxidant and nickel acetate as a promoter, a wide range of unsymmetric thiosulfonates could be furnished easily in moderate to excellent yields starting from N-substituted O-thiocarbamates and sodium sulfinates. This protocol features mild conditions, short reaction times, and high atomic utilization, which can provide an alternative method for the synthesis of unsymmetric