Tos-PEG4-COOtBu

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Category	Tos-PEGn-COOtBu
Catalog NO.	BPG-3464
Product Name	Tos-PEG4-COOtBu
CAS	217817-01-1
Molecular Formula	C20H32O8S
Molecular Weight	432.53

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Description	Tos-PEG4-COOtBu linker bears a t-butyl ester and a tosyl group. The hydrophilic PEG spacer increases the solubility in aqueous media. The carboxyl group protected by tert-butyl can be deprotected under acidic conditions. Tosyl group is a very good leaving group for nucleophilic substitution reaction.
Synonyms	3-(2-{2-[2-(Toluene-4-sulfonyloxy)-ethoxy]-ethoxy}-ethoxy)-propionic acid tert-butyl ester; Tos-PEG4-Boc; 2-(2-(tert-butoxycarbonyl)ethoxy)ethyl 4-methylbenzenesulfonate; 2-(2-(tert-butoxycarbonyl)ethoxy)ethyl4-methylbenzenesulfonate; Tos-PEG4-t-butyl ester; tert-butyl 3-(2-(2-(2-(tosyloxy)ethoxy)ethoxy)ethoxy)propanoate
IUPAC Name	tert-butyl 3-[2-[2-[2-(4-methylphenyl)sulfonyloxyethoxy]ethoxy]ethoxy]propanoate
Canonical SMILES	CC1=CC=C(C=C1)S(=O)(=O)OCCOCCOCCOCCC(=O)OC(C)(C)C
InChI	InChI=1S/C20H32O8S/c1-17-5-7-18(8-6-17)29(22,23)27-16-15-26-14-13-25-12-11-24-10-9-19(21)28-20(2,3)4/h5-8H,9-16H2,1-4H3
InChIKey	AAQWIVKRAHBPDM-UHFFFAOYSA-N
Boiling Point	528.5±45.0 °C at 760 mmHg
Purity	≥95%
Density	1.2±0.1 g/cm3
Solubility	Soluble in DMSO
Storage	Store at 2-8°C for short term (days to weeks) or -20°C for long term (months to years)

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