1-(Trimethylsiloxy)cyclopentene

CAS No.：19980-43-9

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1-(Trimethylsiloxy)cyclopentene Basic information

Product Name:	1-(Trimethylsiloxy)cyclopentene
Synonyms:	CYCLOPENTANONE ENOL TRIMETHYL SILYL ETHER;(CYCLOPENTENYLOXY)TRIMETHYLSILANE;1-(TRIMETHYLSILOXY)CYCLOPENTENE;1-(TRIMETHYLSILYLOXY)CYCLOPENTENE;(1-CYCLOPENTENYLOXY)TRIMETHYLSILANE;(1-cyclopenten-1-yloxy)trimethylsilane;(Cyclopentenyloxy)trimethylsylane;1-(TRIMETHYLSILYLOXY)CYCLOPENTENE 97+%
CAS:	19980-43-9
MF:	C8H16OSi
MW:	156.3
EINECS:	243-448-4
Product Categories:	Monoalkoxysilanes;Si (Classes of Silicon Compounds);Silicon Compounds (for Synthesis);Si-O Compounds;Synthetic Organic Chemistry
Mol File:	19980-43-9.mol

1-(Trimethylsiloxy)cyclopentene Chemical Properties

Boiling point	45 °C/11 mmHg (lit.)
density	0.878 g/mL at 25 °C (lit.)
refractive index	n20/D 1.440(lit.)
Fp	101 °F
storage temp.	−20°C
form	clear liquid
color	Colorless to Light yellow to Light orange
Specific Gravity	0.878
Hydrolytic Sensitivity	7: reacts slowly with moisture/water
BRN	385956
CAS DataBase Reference	19980-43-9(CAS DataBase Reference)
EPA Substance Registry System	Silane, (1-cyclopenten-1-yloxy)trimethyl- (19980-43-9)

Safety Information

Hazard Codes	Xi
Risk Statements	10-36/37/38
Safety Statements	26-36
RIDADR	UN 1993 3/PG 3
WGK Germany	3
F	10-21
TSCA	Yes
HazardClass	3.2
PackingGroup	III
HS Code	29319090

MSDS Information

Provider	Language
SigmaAldrich	English

1-(Trimethylsiloxy)cyclopentene Usage And Synthesis

Chemical Properties	Clear light yellow liquid
Uses	1-(Trimethylsiloxy)cyclopentene may be used in chemical synthesis studies.
Purification Methods	If too impure as seen by the NMR spectrum, then dissolve it in 10 volumes of pentane, shake with cold NaHCO3 (3 x 500mL), then 1.5M HCl (200mL) and aqueous NaHCO3 (200mL) again, dry (Na2SO4), filter, evaporate and distil it through a short Vigreux column (p 11). 1H NMR: (CDCl3) : 0.21 (s, 9H), 1.55 (m, 2H), 1.69 (m, 2H), 2.05 (br d, 4H) and 4.88 (br s, 1H). GLPC in a 6ft x 1/8inch with 3% SP2100 on 100-120 mesh Supelcoport column should give one peak. Store dry. [For the cyclohexene analogue see Varghese et al. Org Synth Coll Vol VIII 460 1993.]

1-(Trimethylsiloxy)cyclopentene Preparation Products And Raw materials

Raw materials	1-Cyclopenten-1-ol-->Ethyl (trimethylsilyl)acetate-->1-METHOXY-1-TRIMETHYLSILYLOXYPROPENE-->TRIMETHYLSILYL TRIFLUOROACETATE-->Hexamethyldisilane-->1,1,1-TRIMETHYL-2,2,2-TRIPHENYLDISILANE-->N-(Trimethylsilyl)acetamide-->Bromotrimethylsilane-->Allyltrimethylsilane-->Cyclopentanone
Preparation Products	1-TRIMETHYLSILYL-2-PYRROLIDINONE-->2-Oxazolidone

Important Notice

This product is a chemical product/pharmaceutical intermediate. It is not a drug, an active pharmaceutical ingredient (API), or a pharmaceutical-grade material. It has not been granted a drug approval number or a Chemical Drug Substance Approval Notice, has not passed drug-related review and approval, and is not manufactured, tested, or released in accordance with pharmaceutical GMP.
This product is intended solely for non-clinical research, process development, quality studies, further chemical processing, or chemical synthesis. It must not be used in drug-product manufacturing, clinical trials, clinical diagnosis, or administration to humans or animals, or be sold, used as an input, submitted for regulatory filing, or released as an API or pharmaceutical material.
The purchaser must not use this product, or supply it to another party, for personal consumption, sports or fitness, weight loss, health supplements, food, or animal feed.

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