1-(Trimethylsiloxy)cyclopentene

1-(Trimethylsiloxy)cyclopentene Basic information

Product Name:	1-(Trimethylsiloxy)cyclopentene
Synonyms:	Cyclopentene,1-[(triMethylsilyl)oxy]-;1-(Trimethylsiloxy)cyclopentene 97%;TRIMETHYLSILYLOXY-1-CYCLOPENTENE;1-Cyclopentenyloxytrimethylsilane, Cyclopentanone enol trimethyl silyl ether;CYCLOPENTANONE ENOL TRIMETHYL SILYL ETHER;(CYCLOPENTENYLOXY)TRIMETHYLSILANE;1-(TRIMETHYLSILOXY)CYCLOPENTENE;(1-CYCLOPENTENYLOXY)TRIMETHYLSILANE
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

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

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