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139177-62-1 - Dysprosium(III) trifluoromethanesulfonate, 98% - Dysprosium(III) triflate - L20252 - Alfa Aesar

L20252 Dysprosium(III) trifluoromethanesulfonate, 98%

Codice CAS
139177-62-1
Sinonimi
Dysprosium(III) triflate

Dimensioni Prezzo ($) Quantità Disponibilità
5g 51,90
25g 159,00
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Dysprosium(III) trifluoromethanesulfonate, 98%

MDL
MFCD00209583

Proprietà chimiche

Formula
C3DyF9O9S3
Peso formula
609.69
Sensibilità
Hygroscopic
Solubilità
Soluble in water.

Applicazioni

Dysprosium(III) trifluoromethanesulfonate is a water-tolerant Lewis acid used in the Aldol reaction of silyl enol ethers with aldehydes. This is an effective catalyst for electrophilic substitution reactions of indoles with imines. Also used as catalyst for Aza-Piancatelli rearrangement, Friedel-Crafts alkylation, ring-opening polymerization reactions, microwave-assisted Kabachnik-Fields condensation, cycloaddition reactions (Lewis-acid catalyst), fries rearrangement and enantioselective glyoxalate-ene reactions.

Note

Hygroscopic. store away from water/moisture. Store in cool. Keep container tightly closed in a dry and well-ventilated place. Store away from oxidizing agent.

Letteratura

Leoni I Palmer; Javier Read de Alaniz. Direct and highly diastereoselective synthesis of azaspirocycles by a dysprosium(III) triflate catalyzed aza-Piancatelli rearrangement. Angewandte Chemie. International edition in English. 2011, 50 (31), 7167-7170.

Patrick D Pohlhaus; Shanina D Sanders; Andrew T Parsons; Wei Li, Jeffrey S Johnson. Scope and mechanism for lewis acid-catalyzed cycloadditions of aldehydes and donor-acceptor cyclopropanes: evidence for a stereospecific intimate ion pair pathway. Journal of the American Chemical Society. 2008, 130 (27), 8642-8650.

The uses of rare-earth metal triflates in organic synthesis have been reviewed by S. Kobayashi: Synlett, 689 (1994); Chem. Rev., 102, 2227 (2002).

Rischio GHS e dichiarazioni precauzionali

Dichiarazioni di rischio (UE): H315-H319-H335

Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Dichiarazioni precauzionali: P261-P280a-P305+P351+P338-P304+P340-P405-P501a

Avoid breathing dust/fume/gas/mist/vapours/spray. Wear protective gloves and eye/face protection. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. Store locked up. Dispose of contents/container in accordance with local/regional/national/international regulations.

Altri riferimenti

Codice tariffe armonizzato
2846.90
TSCA
No

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