Product

2-Ethyl-5-phenylisoxazolium-3'-sulfonate

CAS No.：4156-16-5

Other grades of this product :

2-Ethyl-5-phenylisoxazolium-3'-sulfonate Basic information

Product Name:	2-Ethyl-5-phenylisoxazolium-3'-sulfonate
Synonyms:	NEPIS;N-ETHYL-5-PHENYLISOXAZOLIUM-3'-SULFONATE;WOODWARDS REAGENT K;WOODWARD'S REAGENT K;2-ETHYL-5-PHENYLISOXAZOLIUM-3'-SULPHONEATE;Isoxazolium, 2-ethyl-5-(3-sulfophenyl)-, inner salt;NEPIS 2-ETHYL-5-PHENYLISOXAZOLIUM-3''-SULFONATE;3-(2-ETHYL-5-ISOXAZOLIO)BENZENESULFONATE 99+%
CAS:	4156-16-5
MF:	C11H11NO4S
MW:	253.27
EINECS:	223-988-7
Product Categories:	Biochemistry;Condensation & Active Esterification;Coupling Reactions (Peptide Synthesis);Peptide Synthesis;Synthetic Organic Chemistry
Mol File:	4156-16-5.mol

2-Ethyl-5-phenylisoxazolium-3'-sulfonate Chemical Properties

Melting point	216-219 °C (dec.)
density	1.3854 (rough estimate)
refractive index	1.4790 (estimate)
storage temp.	Store at RT.
Merck	10050
BRN	4149224
CAS DataBase Reference	4156-16-5(CAS DataBase Reference)

Safety Information

Hazard Codes	Xn
Risk Statements	22
WGK Germany	3

MSDS Information

Provider	Language
SigmaAldrich	English

2-Ethyl-5-phenylisoxazolium-3'-sulfonate Usage And Synthesis

Chemical Properties	white to off-white crystalline powder
Uses	Peptide-bond former.
Purification Methods	Crystallise the reagent from diethyl ether or ethyl acetate/pet ether. [Lamas et al. J Am Chem Soc 108 5543 1986.] It is best purified by dissolving in excess of aqueous N HCl and precipitating with Me2CO to give a white fluffy solid. [Woodward et al. Tetrahedron 22 Suppl 8 321 1966, Fieser & Fieser Reagents for Organic Synthesis 1 385, 2 198.]

2-Ethyl-5-phenylisoxazolium-3'-sulfonate Preparation Products And Raw materials

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