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Sigma-Aldrich

SPhos

95%

Synonym(s):

2-Dicyclohexylphosphino-2′,6′-dimethoxybiphenyl, S Phos

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About This Item

Empirical Formula (Hill Notation):
C26H35O2P
CAS Number:
657408-07-6
Molecular Weight:
410.53
MDL number:
MFCD05861611
UNSPSC Code:
12161600
NACRES:
NA.22

Assay

95%

form

powder or crystals

reaction suitability

reaction type: Buchwald-Hartwig Cross Coupling Reaction
reaction type: Heck Reaction
reaction type: Hiyama Coupling
reaction type: Negishi Coupling
reaction type: Sonogashira Coupling
reaction type: Stille Coupling
reaction type: Suzuki-Miyaura Coupling
reagent type: catalyst
reaction type: Cross Couplings
reagent type: ligand

mp

164-166 °C (lit.)
165.5 °C

functional group

phosphine

SMILES string

COc1cccc(OC)c1-c2ccccc2P(C3CCCCC3)C4CCCCC4

InChI

1S/C26H35O2P/c1-27-23-17-11-18-24(28-2)26(23)22-16-9-10-19-25(22)29(20-12-5-3-6-13-20)21-14-7-4-8-15-21/h9-11,16-21H,3-8,12-15H2,1-2H3

InChI key

VNFWTIYUKDMAOP-UHFFFAOYSA-N

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General description

SPhos [2-Dicyclohexylphosphino-2′, 6′-dimethoxybiphenyl] is an air-stable, electron-rich biaryl phosphine ligand developed by the Buchwald group to enhance the reactivity of palladium catalysis during cross-coupling reactions.

Application

SPhos may be used as a ligand in the following processes:
  • Palladium catalyzed Suzuki-Miyaura cross-coupling reaction between Boc-protected aminomethyltrifluoroborate and aryl chlorides or hetaryl chlorides to form the corresponding aminomethylarenes.
  • Palladium catalyzed Suzuki-Miyaura cross-coupling reaction between 4-methyl-substituted piperidinylzinc reagent and different aryl or heteroaryl iodides to form various substituted piperidines.
  • Intramolecular Suzuki-Miyaura coupling to form the 18-membered macrocyclic ring during the multi-step synthesis of riccardin C.
Utilized in conjunction with palladium to form a highly active catalyst for C-N bond formation
Highly universal ligand for Suzuki-Miyaura coupling; aryl chlorides, hindered biaryls, heterobiaryls.

Legal Information

Usage subject to Patents: US 6307087; EP 1097158; JP 5758844; CA 2336691

Storage Class Code

11 - Combustible Solids

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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Evidence for the formation and structure of palladacycles during Pd-catalyzed C-N bond formation with catalysts derived from bulky monophosphinobiaryl ligands.
Eric R Strieter et al.
Angewandte Chemie (International ed. in English), 45(6), 925-928 (2005-12-29)
Synthesis of riccardin C and its seven analogues. Part 1: The role of their phenolic hydroxy groups as LXR? agonists
Hioki, Hideaki, et al.
Bioorganic & Medicinal Chemistry Letters, 19.3, 738-741 (2009)
Synthesis and Suzuki-Miyaura Cross-Coupling Reactions of Potassium Boc-Protected Aminomethyltrifluoroborate with Aryl and Hetaryl Halides.
Molander GA and Shin I.
Organic Letters, 13(15), 3956-3959 (2011)
Pd-catalyzed Suzuki?Miyaura reactions of aryl halides using bulky biarylmonophosphine ligands
Altman, Ryan A., and Stephen L. Buchwald
Nature Protocols, 2.12 (2007)
Seel S, et al.
Journal of the American Chemical Society, 133(13), 4774-4777 (2011)
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