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803863

Sigma-Aldrich

Schreiner′s Thiourea Catalyst

greener alternative

95%

Sinónimos:

N,N′−bis[3,5−bis(trifluoromethyl)phenyl]−Thiourea

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About This Item

Fórmula empírica (notación de Hill):
C17H8F12N2S
Número de CAS:
1060-92-0
Peso molecular:
500.30
MDL number:
MFCD00829878
UNSPSC Code:
12161600
PubChem Substance ID:
329768830
NACRES:
NA.22

Quality Level

100

assay

95%

form

powder or crystals

reaction suitability

reagent type: catalyst

greener alternative product characteristics

Catalysis
Learn more about the Principles of Green Chemistry.

sustainability

Greener Alternative Product

mp

170 °C

greener alternative category

Aligned,

SMILES string

S=C(NC1=CC(C(F)(F)F)=CC(C(F)(F)F)=C1)NC2=CC(C(F)(F)F)=CC(C(F)(F)F)=C2

InChI

1S/C17H8F12N2S/c18-14(19,20)7-1-8(15(21,22)23)4-11(3-7)30-13(32)31-12-5-9(16(24,25)26)2-10(6-12)17(27,28)29/h1-6H,(H2,30,31,32)

InChI key

RWXWQJYJWJNJNW-UHFFFAOYSA-N

Categorías relacionadas

General description

We are committed to bringing you Greener Alternative Products, which adhere to one or more of The 12 Principles of Greener Chemistry. This product has been enhanced for catalytic efficiency. Click here for more information.

Application

Thiourea catalyst, also known as Schreiner′s Thiourea, is commonly used as a hydrogen-bond donor in the activation of carbonyls, nitroolefins, imines etc.

Other Notes

N,N′-Bis[3,5-bis(trifluoromethyl)phenyl]thiourea: a privileged motif for catalyst development

pictograms

Exclamation mark
GHS07

signalword

Warning

hcodes

H315,H319

Hazard Classifications

Eye Irrit. 2 - Skin Irrit. 2

Storage Class

11 - Combustible Solids

wgk_germany

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

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Certificados de análisis (COA)

Lot/Batch Number
MKCW4343
MKCT8256
MKCR5397
MKCH2666
MKCD9129

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N,N′-Diphenylthiourea 98%

Sigma-Aldrich

T28355

N,N′-Diphenylthiourea

Water-compatible hydrogen-bond activation: a scalable and organocatalytic model for the stereoselective multicomponent aza-Henry reaction.
Fabio Cruz-Acosta et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 19(49), 16550-16554 (2013-11-28)
Michael T Corbett et al.
Organic letters, 16(9), 2362-2365 (2014-04-22)
The stereoselective synthesis of trisubstituted 2-trifluoromethyl pyrrolidines by asymmetric Michael addition/hydrogenative cyclization is described. The direct organocatalytic addition of 1,1,1-trifluoromethylketones to nitroolefins proceeds under mild reaction conditions and low catalyst loadings to provide Michael adducts in high yield with excellent
Thiophosphoramide-based cooperative catalysts for Brønsted acid promoted ionic Diels-Alder reactions.
Alina Borovika et al.
Angewandte Chemie (International ed. in English), 52(50), 13424-13428 (2013-10-19)
Peter R Schreiner et al.
Organic letters, 4(2), 217-220 (2002-02-14)
[reaction: see text] A combination of NMR, IR, and ab initio techniques reveals the striking structural similarities of an exemplary H-bonded complex of an N-acyloxazolidinone with an N,N'-disubstituted electron-poor thiourea and the corresponding Lewis acid complex. Although the H-bond association
Alexander Wittkopp et al.
Chemistry (Weinheim an der Bergstrasse, Germany), 9(2), 407-414 (2003-01-18)
We examined the catalytic activity of substituted thioureas in a series of Diels-Alder reactions and 1,3-dipolar cycloadditions. The kinetic data reveal that the observed accelerations in the relative rates are more dependent on the thiourea substituents than on the reactants
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Boronate ureas benefit from internal Lewis acid coordination of the urea cabonyl oxygen and the strategically placed boron. As a result of this structural feature, boronate ureas can be rendered more acidic than conventional urea hydrogen bond donor catalysts.

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