2-Trimethylsilyl-1,3-dithian

Bezeichnung:2-Trimethylsilyl-1,3-dithian

CAS-Nr13411-42-2

Englisch Name:2-TRIMETHYLSILYL-1,3-DITHIANE

CBNumberCB2671400

SummenformelC7H16S2Si

Molgewicht192.42

MOL-Datei13411-42-2.mol

Synonyma

2-Trimethylsilyl-1,3-dithian

2-Trimethylsilyl-1,3-dithian physikalisch-chemischer Eigenschaften

Siedepunkt	54-55 °C0.17 mm Hg(lit.)
Dichte	1.014 g/mL at 25 °C(lit.)
Brechungsindex	n20/D 1.533(lit.)
Flammpunkt	205 °F
storage temp.	2-8°C
Löslichkeit	Insol H2O; sol organic solvents.
Aggregatzustand	clear liquid
Farbe	Colorless to Light yellow to Light orange
Wichte	1.014
Hydrolytic Sensitivity	4: no reaction with water under neutral conditions
BRN	1616463
CAS Datenbank	13411-42-2(CAS DataBase Reference)

Sicherheit

S-Sätze:	23-24/25
RIDADR	3334
WGK Germany	3
F	13
TSCA	No
HS Code	2934.99.9001

2-TRIMETHYLSILYL-1,3-DITHIANE Chemische Eigenschaften,Einsatz,Produktion Methoden

S-Sätze Betriebsanweisung:
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S24/25:Berührung mit den Augen und der Haut vermeiden.
Chemische Eigenschaften
CLEAR COLORLESS TO SLIGHTLY YELLOW LIQUID
Physikalische Eigenschaften
bp 54–55 °C/0.17 mmHg.
Verwenden
A versatile acyl anion equivalent.1,2
Verwenden
2-Trimethylsilyl-1,3-dithiane is the precursor of dithioketene acetals which are good substrates for both cationic and anionic cyclization processes; the anion reacts with unsaturated ketones and aldehydes to give vinyl dithioketene acetals that can be used as dienes or for the preparation of substituted α,β-unsaturated alkyl ketones; alkylation of the anion provides a general synthesis of acylsilanes. It participates the following reactions: Thioketene Acetals, Cationic and Anionic Cyclizations, Unsaturated Dithioketene Acetals, Acylsilanes, Multicomponent Linchpin Reactions, Formation of Bis(acylsilanes) etc.
synthetische
2-Trimethylsilyl-1,3-dithiane is prepared by alkylation of 2-lithio-1,3- dithiane with chlorotrimethylsilane (eq 1).
Allgemeine Beschreibung
2-(Trimethylsilyl)-1,3-dithiane participates in Lewis base-catalyzed 1,3-dithiane addition to electrophiles such as carbonyl compounds and N-substituted aldimines. It undergoes novel diazo transfer reaction with tosyl azide in hexamethylphosphoramide-THF to yield 2-diazo-1,3-dithiane, which on decomposition yields formal carbene adducts. It is a versatile acyl anion equivalent.
läuterung methode
Fractionally distil the dithiane through an efficient column and collect the fractions that have the correct NMR and IR spectra. 1H NMR (CCl4) 6.36 (SiMe3), 9.87 (SCHS) and dithiane H at 7 and 8 (ratio 1:9:4:2) from Me4Si; UV 244nm ( 711), sh 227nm ( 800). [Corey et al. J Am Chem Soc 89 max 434 1967.]

2-TRIMETHYLSILYL-1,3-DITHIANE Upstream-Materialien And Downstream Produkte

2-Trimethylsilyl-1,3-dithian Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

13411-42-2, 2-TRIMETHYLSILYL-1,3-DITHIANE Verwandte Suche:

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