Tetraethylene glycol p-toluenesulfonate
Synonym(s):2-[2-[2-(2-Hydroxyethoxy)ethoxy]ethoxy]ethyl 4-methylbenzenesulfonate;2-[2-[2-(2-Hydroxyethoxy)ethoxy]ethoxy]ethyl toluene-4-sulfonate;2-[2-[2-(2-Hydroxyethoxy)ethoxy]ethoxy]ethyl toluenesulfonate;2-[2-[2-(2-Hydroxyethoxy)ethoxy]ethoxy]ethyl tosylate;Monotosylated tetraethylene glycol
- CAS NO.:77544-60-6
- Empirical Formula: C15H24O7S
- Molecular Weight: 348.41
- MDL number: MFCD22056303
- SAFETY DATA SHEET (SDS)
- Update Date: 2024-10-23 13:36:13
What is Tetraethylene glycol p-toluenesulfonate?
Description
PEG5-Tos is a PEG linker containing a hydroxyl group with a tosyl group. The hydrophilic PEG spacer increases solubility in aqueous media. The hydroxyl group enables further derivatization or replacement with other reactive functional groups. The tosyl group is a very good leaving group for nucleophilic substitution reactions.
The Uses of Tetraethylene glycol p-toluenesulfonate
Tetraethylene glycol monotosylate is a cleavable and acylhydrazone-based ADC linker used in the synthesis of antibody-drug conjugates (ADCs). Tetraethylene glycol monotosylate also can be used as a PROTAC linker that can be used in the synthesis of PROTACs.
Preparation
Synthesis of tetraethylene glycol tosylate. To a solution of tetraethylene glycol (2.22 g, 11.4 mmol, 3.8 equiv) in THF at 0 °C was added 2.5 M NaOH (2 mL, 5.0 mmol, 1.7 equiv) and stirred for 30 min. Tosyl chloride (565.3 mg, 3.0 mmol, 1 equiv) was added in small portions and the mixture stirred for 5 h. The solvent was removed under reduced pressure, and the residue was taken up in CH2Cl2 (15 mL) and washed with water (3 × 10 mL). The aqueous wash was further extracted with CH2Cl2 (3 × 10 mL) and the combined organic fractions were washed with brine and dried over anhydrous Na2SO4. The dried solution was filtered and the filtrate was concentrated under reduced pressure to give 900.8 mg of a pale yellow oil (87%). The product was sufficiently pure to be used without further purification.
Properties of Tetraethylene glycol p-toluenesulfonate
Boiling point: | 492.5±40.0 °C(Predicted) |
Density | 1.202 g/mL at 25 °C |
refractive index | n20/D1.507 |
Flash point: | >110℃ |
storage temp. | 2-8°C |
solubility | Soluble in Water, DMSO, DCM, DMF |
form | Oil |
pka | 14.36±0.10(Predicted) |
color | Colourless |
Safety information for Tetraethylene glycol p-toluenesulfonate
Signal word | Danger |
Pictogram(s) |
Corrosion Corrosives GHS05 Skull and Crossbones Acute Toxicity GHS06 |
GHS Hazard Statements |
H301:Acute toxicity,oral H314:Skin corrosion/irritation |
Precautionary Statement Codes |
P270:Do not eat, drink or smoke when using this product. P280:Wear protective gloves/protective clothing/eye protection/face protection. P301+P330+P331:IF SWALLOWED: Rinse mouth. Do NOT induce vomiting. P303+P361+P353:IF ON SKIN (or hair): Remove/Take off Immediately all contaminated clothing. Rinse SKIN with water/shower. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for Tetraethylene glycol p-toluenesulfonate
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