Reaction of Thiocarbonyl Fluoride Generated from Difluorocarbene with Amines
作者:Jiao Yu、Jin-Hong Lin、Ji-Chang Xiao
DOI:10.1002/anie.201710186
日期:2017.12.22
The reaction of thiocarbonyl fluoride, generated from difluorocarbene, with various amines under mild conditions is described. Secondary amines, primary amines, and o‐phenylenediamines are converted to thiocarbamoyl fluorides, isothiocyanates, and difluoromethylthiolated heterocycles, respectively. Thiocarbamoyl fluorides were further transformed into trifluoromethylated amines by using a one‐pot process
Triflic acid-promoted cycloisomerization of 2-alkynylphenyl isothiocyanates and isocyanates: a novel synthetic method for a variety of indole derivatives
A new approach towards the synthesis of indolederivatives via triflic acid-promoted cycloisomerization with rearrangement of 2-(alkyn-1-yl)phenylisothiocyanates and 2-(alkyn-1-yl)phenylisocyanates has been achieved. By this methodology, structurally diverse types of indolederivatives such as thieno- and furo-indoles, spiro-indolethiones, spiro-oxindoles, and 3-alkylidene-oxindoles were synthesized
Catalyst- and solvent-free bisphosphinylation of isothiocyanates: a practical method for the synthesis of bisphosphinoylaminomethanes
作者:Li-Rong Wen、Yong-Xu Sun、Jin-Wei Zhang、Wei-Si Guo、Ming Li
DOI:10.1039/c7gc03101g
日期:——
A general and convenient double addition of phosphine oxides to isothiocyanates is described. It is a practically useful protocol for the construction of bisphosphinoylaminomethanes. The reaction can be carried out smoothly under metal- and solvent-free conditions. It also features a broad substrate scope, simple operation and purification. A possible mechanism involving a tandem double nucleophilic
描述了将氧化膦一般且方便地双重加到异硫氰酸酯中的方法。这是构建双膦酰基氨基甲烷的实用方法。该反应可以在无金属和无溶剂的条件下平稳地进行。它还具有广泛的底物范围,简单的操作和纯化。提出了可能的机制,包括串联双亲核加成/ H 2 S消除/原位亚胺还原过程。
Organophosphine-free copper-catalyzed isothiocyanation of amines with sodium bromodifluoroacetate and sulfur
作者:Wei Feng、Xing-Guo Zhang
DOI:10.1039/c8cc09190k
日期:——
A new copper-catalyzed isothiocyanation of amines with sodium bromodifluoroacetate and sulfur for the synthesis of isothiocyanates and various heterocycles is described.
Tandem addition–cyclization of o-ethynylphenyl isothiocyanates with N nucleophiles; difference of cyclization mode between primary and secondary amines
作者:Mamoru Kaname、Haruki Sashida
DOI:10.1016/j.tetlet.2011.11.133
日期:2012.2
mode cyclization of the N-(2-ethynylphenyl)thioureas, which were easily obtained from the o-ethynylphenyl isothiocyanates and the primary amines, to provide the 2-imino-4-methylidene-1H-benzo[d][1,3]thiazines as the sole product in excellent yields. The secondaryamines reacted with the o-ethynylphenyl isothiocyanates to give both the 6-exo and 5-endo-dig mode cyclization products under the same conditions
三氟甲磺酸银促进了N-(2-乙炔基苯基)硫脲的6-exo-dig模式环化反应,这是很容易从邻乙炔基苯基异硫氰酸酯和伯胺获得的,从而提供了2-亚氨基-4-亚甲基-1 H作为唯一产品的-苯并[ d ] [1,3]噻嗪具有极好的收率。仲胺与邻乙炔基苯基异硫氰酸酯在相同条件下反应,生成6-exo和5-endo-dig模式环化产物。