369675

(S)-(+)-α-Methoxy-α-(trifluoromethyl)phenylacetyl chloride

99%

• Synonym(s): (S)-(+)-MTPA-Cl, Mosher’s acid chloride
• Linear Formula: C₆H₅C(OCH₃)(CF₃)COCl
• CAS Number: 20445-33-4
• Molecular Weight: 252.62
• Beilstein/REAXYS Number: 3591562
• MDL number: MFCD00067105
• UNSPSC Code: 12352101
• PubChem Substance ID: 24863007
• NACRES: NA.22

Properties

• Quality Level: 200
• assay: 99%
• form: liquid
• optical purity: ee: 98% (GLC)
• refractive index: n20/D 1.469 (lit.)
• bp: 213-214 °C (lit.)
• density: 1.35 g/mL at 25 °C (lit.)
• functional group: acyl chloride; ether; fluoro; phenyl
• storage temp.: −20°C
• SMILES string: CO[C@@](C(Cl)=O)(c1ccccc1)C(F)(F)F
• InChI: 1S/C10H8ClF3O2/c1-16-9(8(11)15,10(12,13)14)7-5-3-2-4-6-7/h2-6H,1H3/t9-/m1/s1
• InChI key: PAORVUMOXXAMPL-SECBINFHSA-N

Description

General description

(S)-(+)-α-Methoxy-α-trifluoromethylphenylacetyl chloride is commonly used as a derivatizing agent in Mosher ester analysis and Mosher amide analysis, which are NMR-based methods for determining the absolute configuration of the chiral carbon center in secondary alcohols and amines, respectively.

Application

Used in the synthesis of natural products and pheromones.

Packaging

Bottomless glass bottle. Contents are inside inserted fused cone.

Other Notes

doi:10.1038/nprot.2007.354

Safety Information

• pictograms: GHS05
• signalword: Danger
• hcodes: H314
• pcodes: P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363 - P405
• Hazard Classifications: Skin Corr. 1B
• Storage Class: 8A - Combustible corrosive hazardous materials
• wgk_germany: WGK 3
• flash_point_f: 192.2 °F - closed cup
• flash_point_c: 89 °C - closed cup
• ppe: Faceshields, Gloves, Goggles, type ABEK (EN14387) respirator filter