NEW QO DEVELOPMENT CHEMICALS

QO Dihydropyran is a colorless, mobile liquid of ether- like odor; it is very reactive, the activity is centered around the double bond. Alcohols add ...
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A QO* CHEMICALS BULLETIN

NEW QO DEVELOPMENT CHEMICALS QO® D i h y d r o p y r a n H2 H,C

H2C

QO® M e t h y l t e t r a h y d r o f u r a n H,C-

CH,

H2C

CH-CH3

CH

CH

QO Dihydropyran is a colorless, mobile liquid of etherlike odor; it is very reactive, the activity is centered around the double bond. Alcohols add readily to the double bond in the presence of acids to give an acetal from which the alcohol can be regenerated. This gives a useful method of protecting the alcohol group during reaction. Dihydropyran also exhibits properties of a vinyl ether. Bulletin 137 describes many more reactions.

QO Methyltetrahydrofuran is a cyclic ether useful in organic synthesis, and may also have value as a reaction solvent. It is a colorless, mobile liquid of ether-like odor. In water it has the property of inverse solubility—that is, solubility increases with a decrease in temperature. Request Bulletin 136.

Physical Properties BOILING POINT, ° C . ( 7 6 0 m m ) Pure C o m p o u n d FREEZING POINT, °C SPECIFIC GRAVITY, 20/4°C REFRACTIVE INDEX, n25/D FLASH POINT, °F (Tag closed c u p ) SOLUBILITY

84.3 —70

0.927. 1.4380.

1.6(25°C) 0.5(25°C)

g./100g. H20

80.2 — 136 0.854 1.4025 12

15.1(20°C)

g. H 2 O / 1 0 0 g . c h e m i c a l WATER AZEOTROPE % water VAPOR PRESSURE, m m . of H g

9.8(b.71-2°C>.

5.3(20°C)

at 0° 10 20 30 40 50 60 70

34.9. 57.0. 148.0... 302.0::] 600.00.'

.37.8 .64.5 ..102 .165 .248 .366 .536

These chemicals are available in cans and 55 gallon drums.

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