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: 3591562
• MDL number: MFCD00067105
• UNSPSC Code: 12352101
• PubChem Substance ID: 24863007
• NACRES: NA.22

Properties

• 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.)
• 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
• Signal Word: Danger
• Hazard Statements: H314
• Precautionary Statements: P280 - P303 + P361 + P353 - P304 + P340 + P310 - P305 + P351 + P338 - P363 - P405
• Hazard Classifications: Skin Corr. 1B
• Storage Class Code: 8A - Combustible corrosive hazardous materials
• WGK: WGK 3
• Flash Point(F): 192.2 °F - closed cup
• Flash Point(C): 89 °C - closed cup
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves