Thiophenol

• Catalog No.: A15916
• CAS Number: 108-98-5
• M. F.: C6H6S
• M. W.: 110.17684
• Purity: 99+%

SYNONYMS

• Title: 苯硫酚
• IUPAC name: benzenethiol
• IUPAC Traditional name: thiophenol
• Synonyms: Phenyl mecaptan; Benzenethiol

DATABASE IDS

• Merck Index: 149355
• CAS Number: 108-98-5
• MDL Number: MFCD00004826
• Beilstein Number: 506523
• EC Number: 203-635-3

PROPERTIES

• Purity: 99+%
• Boiling Point: 168-169°C
• Density: 1.075
• Flash Point: 55°C(131°F)
• Melting Point: -15°C
• Refractive Index: 1.5900
• GHS Hazard statements: H300-H310-H330-H315-H335-H318-H226-H361
• European Hazard Symbols: Highly toxic (T+)
• GHS Precautionary statements: P260-P280-P305+P351+P338-P302+P352-P309-P310
• Risk Statements: 10-24/25-26-37/38-41-63
• RTECS: DC0525000
• Safety Statements: 23-26-28-36/37/39-45
• Storage Warning: Air Sensitive
• TSCA Listed: 是
• Hazard Class: 6.1
• UN Number: UN2337
• Packing Group: I

REFERENCES

• For a detailed investigation of alkylation using, e.g. K₂CO₃ in acetone, see: Synth. Commun., 22, 1691 (1992). Unactivated aryl chlorides undergo nucleophilic substitution in the presence of K₂CO₃ in NMP to give aryl sulfides: J. Org. Chem., 56, 862 (1991).
• Michael additions occur readily with electron deficient alkenes. Subsequent chlorination with NCS and dehydrochlorination provides a stereoselective route to vinyl thioethers: J. Org. Chem., 46, 235 (1981):
  
• The Cu(I) derivative, phenylthiocopper forms complexes with alkyllithiums, which are useful alkyl transfer reagents, undergoing conjugate addition to enones, coupling with alkyl iodides to alkanes, and converting acid halides to ketones: J. Am. Chem. Soc., 95, 7788 (1973); Synthesis, 662 (1974); Org. Synth. Coll., 6, 248 (1988).
• Chlorination of PhSH with NCS: J. Org. Chem., 37, 1367 (1972), or SO₂Cl₂: Org. Synth. Coll., 8, 550 (1993), gives the useful reagent benzenesulfenyl chloride, PhSCl.
• Dilithiation of PhSH with n-BuLi and TMEDA gives exclusive ortho-metallation: J. Am. Chem. Soc., 111, 654, 665, 2327 (1989). Subsequent treatment of the dilithio species with DMF, followed by in situ reaction with chloroacetone provides a useful route to the benzo[b]thiophene system: J. Org. Chem., 58, 1293 (1993):
  
• Interception of the DMF adduct provides a source of the unstable 2-mercaptobenzaldehyde. Alternatively, ortho-metallated thiophenols can be formed by lithiation of the THP ether, in which coordination by oxygen favors ortho-lithiation: J. Am. Chem. Soc., 111, 658 (1989).