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A13788 4-Methoxybenzenesulfonyl chloride, 98+%

CAS Number
p-Anisolesulfonyl chloride

Stock No. Size Price ($) Quantity Availability
A13788-14 25g 50.90
A13788-22 100g 137.00
A13788-36 500g 535.00
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4-Methoxybenzenesulfonyl chloride, 98+%


Chemical Properties

Formula Weight
Melting point
Boiling Point
Flash Point
Storage & Sensitivity
Keep Cold. Moisture Sensitive.
Soluble in Toluene. Decomposes in water.


4-Methoxybenzenesulfonyl chloride is used as an anti-HIV as Pharmaceutical Intermediates. It also acts as protecting group agent for various nitrogen functions.


Moisture Sensitive. Store at 4°C. Store in a cool and dark place. Protect from moisture. Store away from strong bases.

Literature References

Yoshihiko Watanabe; Nobuyuki Mase; Moto-aki Tateyama; Takeshi Toru. An improved and efficient procedure for the preparation of chiral sulfinates from sulfonyl chloride using triphenylphosphine.Tetrahedron: Asymmetry.1999, 10 737-745.

Yujie Sun; Chengyin Wang; Qunyin Wen; Guoxiu Wang; Honghai Wang; Qishu Qu; Xiaoya Hu. Determination of Glyphosate and Aminomethylphosphonic Acid in Water by LC Using a New Labeling Reagent, 4-Methoxybenzenesulfonyl Fluoride.Chromatographia.2010, 72 679-686.

Amines and other N-functions can be protected as 4-methoxybenzenesufonyl (PMBS, Mps) derivatives: Chem. Pharm. Bull., 29, 2592 (1981), useful for the imidazole in histidines, stable to TFA and HBr/AcOH: Bull. Chem. Soc. Jpn., 47, 3146 (1974); J. Org. Chem., 45, 547 (1980); deprotection in TFA is promoted by dimethyl sulfide: J. Chem. Soc., Chem. Commun., 955 (1979). For deprotection of PMBS-indoles using Mg in methanol, see: J. Org. Chem., 62, 6519 (1997).

Also used for protection of the guanidino function of arginine residues in peptide synthesis. The sulfonamide is cleaved by triflic acid under less drastic conditions than tosyl groups: Chem. Pharm. Bull., 24, 1568 (1976). Compare also 4-Methoxy-2,3,6-trimethyl­benzenesulfonyl­ chloride, L11829. See Appendix 6.

GHS Hazard and Precautionary Statements

Hazard Statements: H314

Causes severe skin burns and eye damage.

Precautionary Statements: P260-P264b-P280-P301+P330+P331-P303+P361+P353-P304+P340-P305+P351+P338-P310-P363-P501c

Do not breathe dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. IF ON SKIN (or hair): Remove/Take off immediately all contaminated clothing. Rinse skin with water/shower. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Immediately call a POISON CENTER or doctor/physician. Wash contaminated clothing before reuse. Dispose of contents/ container to an approved waste disposal plant

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