Results 241 to 250 of about 41,140 (322)
Use of Novel Homochiral Thioureas Camphor Derived as Asymmetric Organocatalysts in the Stereoselective Formation of Glycosidic Bonds. [PDF]
MoleculesLópez M +6 more
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β-Selective 2-Deoxy- and 2,6-Dideoxyglucosylations Catalyzed by Bis-Thioureas. [PDF]
J Am Chem SocBeyer PD +3 more
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Urea hydrogen-bond donor strengths: bigger is not always better.
Phys Chem Chem PhysNieuwland C +3 more
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Journal of Molecular Structure, 2019
Several single enantiomer thioureas have been synthesized and have been converted to their cyclic derivatives: 2-imino-thiazolidin-4-ones. The conformations of the thioureas have been determined in solution and in the solid state.
Safiye Sag Erdem +2 more
exaly +2 more sources
Several single enantiomer thioureas have been synthesized and have been converted to their cyclic derivatives: 2-imino-thiazolidin-4-ones. The conformations of the thioureas have been determined in solution and in the solid state.
Safiye Sag Erdem +2 more
exaly +2 more sources
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
openaire +3 more sources
Facile, efficient synthesis of polysubstituted thiazoles via α-nitroepoxides and thioureas
Tetrahedron, 2016Dong-Yun Zhao +4 more
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Facile synthesis of aliphatic isothiocyanates and thioureas on solid phase using peptide coupling reagents [PDF]
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
exaly +2 more sources
A facile method for the preparation of carbodiimides from thioureas and (Boc) 2 O
Tetrahedron Letters, 2018Hai-Tao Yang, Chun-Bao Miao
exaly +2 more sources
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
openaire +2 more sources