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Unclicking of thioureas: Base catalyzed elimination of anilines and isothiocyanates from thioureas [PDF]
Tetrahedron, 2019 Bisaromatic thioureas are widely used in e.g. asymmetric organocatalysis and considered to be robust compounds. Herein we show, in strong contrast to common notion, that thioureas dissociate to amines and isothiocyanates in a base catalyzed reaction under mild conditions. This 'unclicking' process can occur in the presence of weak organic bases even at
Matea Vlatkovic, Ben Feringa
exaly +4 more sources
Tetrahedron Letters, 2004 Peptide coupling reagents can be used as versatile reagents for the formation of aliphatic isothiocyanates and thioureas on solid phase from the corresponding solid-phase anchored aliphatic primary amines.
Ulrik Boas +2 more
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Chemical Communications, 2013
In this viewpoint, we discuss the seminal work contributed by Dixon, who reported the first use of a bifunctional cinchona-derived thiourea organocatalyst for the enantioselective conjugate addition of malonate esters to nitroalkenes. Since then, this class of catalysts has been extensively utilized in a variety of fundamental transformations.
Yumeng, Xi, Xiaodong, Shi
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In this viewpoint, we discuss the seminal work contributed by Dixon, who reported the first use of a bifunctional cinchona-derived thiourea organocatalyst for the enantioselective conjugate addition of malonate esters to nitroalkenes. Since then, this class of catalysts has been extensively utilized in a variety of fundamental transformations.
Yumeng, Xi, Xiaodong, Shi
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Thermodynamic Analysis of Decomposition of Thiourea and Thiourea Oxides
The Journal of Physical Chemistry B, 2005Thiourea has exhibited extremely rich dynamical behavior when being oxidized either through a chemical approach or via an electrochemical method. In this study, thermodynamic properties of thiourea and its oxides are investigated by measuring their thermogravimetry (TG), differential thermogravimetry (DTG), and differential scanning calorimetry (DSC ...
Shun, Wang, Qingyu, Gao, Jichang, Wang
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Oxidation of thiourea and substituted thioureas: a review
Journal of Sulfur Chemistry, 2011Thioureas, containing sulfur and nitrogen atoms, are susceptible to oxidation by a large number of oxidants giving rise to various products including ureas, sulfides, oxides of sulfur, and nitrogen. Some novel cyclized products were also obtained during oxidation.
Sandhyamayee Sahu +3 more
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Molecular Structure of Thiourea
The Journal of Physical Chemistry A, 2012The molecular structure of thiourea has been investigated under C(s), C(2), and C(2v) symmetry constraints. At the coupled-cluster level in conjunction with a triple-ζ basis set, only the C(2) conformer has been found to be a real minimum on the potential energy surface.
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Nature, 1946
DIFFERENT workers have found the toxicity of thiourea to rats to be very variable1,2,3. Dieke and Richter4 claim that the degree of susceptibility of rats to poisoning by thiourea can be correlated with breed and age. They also suggest that diet plays some part.
F W, LANDGREBE, T N, MORGAN
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DIFFERENT workers have found the toxicity of thiourea to rats to be very variable1,2,3. Dieke and Richter4 claim that the degree of susceptibility of rats to poisoning by thiourea can be correlated with breed and age. They also suggest that diet plays some part.
F W, LANDGREBE, T N, MORGAN
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Electrostatically Enhanced Thioureas
Organic Letters, 2016A new class of readily prepared thiourea catalysts with one or more positively charged centers and no new hydrogen-bonding sites are exploited in several bond-forming reactions and are orders of magnitude more reactive than Schreiner's thiourea. These findings provide the basis for a new strategy for activating hydrogen-bond catalysts.
Yang, Fan, Steven R, Kass
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