675938

Sigma-Aldrich

Me4tButylXphos

96%

Synonym(s):
2-Di-tert-butylphosphino-3,4,5,6-tetramethyl-2′,4′,6′-triisopropyl-1,1′-biphenyl, Tetramethyl di-tBuXPhos, Tetramethyl tBuXPhos
Empirical Formula (Hill Notation):
C33H53P
CAS Number:
Molecular Weight:
480.75
MDL number:
PubChem Substance ID:
NACRES:
NA.22

Quality Level

assay

96%

reaction suitability

reaction type: Cross Couplings
reagent type: ligand
reaction type: Buchwald-Hartwig Cross Coupling Reaction

reagent type: ligand
reaction type: C-X Bond Formation

mp

168-172 °C

functional group

phosphine

SMILES string

CC(C)c1cc(C(C)C)c(c(c1)C(C)C)-c2c(C)c(C)c(C)c(C)c2P(C(C)(C)C)C(C)(C)C

InChI

1S/C33H53P/c1-19(2)26-17-27(20(3)4)30(28(18-26)21(5)6)29-24(9)22(7)23(8)25(10)31(29)34(32(11,12)13)33(14,15)16/h17-21H,1-16H3

InChI key

RCRYEYMHBHPZQD-UHFFFAOYSA-N

Packaging

250 mg in glass bottle
1, 5 g in glass bottle

Application

Ligand used in a palladium-catalyzed amidation of aryl chlorides.

Legal Information

Usage subject to US Patents 6307087 and 6395916.

storage_class_code

13 - Non Combustible Solids

WGK Germany

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

Takashi Ikawa et al.
Journal of the American Chemical Society, 129(43), 13001-13007 (2007-10-09)
We present results on the amidation of aryl halides and sulfonates utilizing a monodentate biaryl phosphine-Pd catalyst. Our results are in accord with a previous report that suggests that the formation of kappa(2)-amidate complexes is deleterious to the effectiveness of...
David S Surry et al.
Chemical science, 2(1), 27-50 (2011-01-01)
Dialkylbiaryl phosphines are a valuable class of ligand for Pd-catalyzed amination reactions and have been applied in a range of contexts. This review attempts to aid the reader in the selection of the best choice of reaction conditions and ligand...
Ruben Martin et al.
Accounts of chemical research, 41(11), 1461-1473 (2008-07-16)
The cores of many types of polymers, ligands, natural products, and pharmaceuticals contain biaryl or substituted aromatic structures, and efficient methods of synthesizing these structures are crucial to the work of a broad spectrum of organic chemists. Recently, Pd-catalyzed carbon-carbon...
David S Surry et al.
Angewandte Chemie (International ed. in English), 47(34), 6338-6361 (2008-07-30)
Palladium-catalyzed amination reactions of aryl halides have undergone rapid development in the last 12 years, largely driven by the implementation of new classes of ligands. Biaryl phosphanes have proven to provide especially active catalysts in this context. This Review discusses...
Articles
Buchwald phosphine ligands for C-C, C-N, and C-O bond formation.
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