Di-n-amyl ether

The above simple process cannot be applied to the preparation of the homo-logues a higher temperature is requir (di-n-amyl ether, for example, boils at 169°) and, under these conditions, alkene formation predominates, leading ultimately to carbonisation and the production of sulphur dioxide. If, however, the water is largely removed by means of a special device (see Fig. Ill, 57,1) as soon as it is formed, good 300 of ethers may be obtained from primary alcohols, for example ... 

Di-n-amyl ether. Use 50 g. (61 5 ml.) of n-amyl alcohol (b.p. 136-137°) and 7 g. (4 ml.) of concentrated sulphuric acid. The calculated volume of water (5 ml.) is collected when the temperature inside the flask rises to 157° (after 90 minutes). Steam distil the reaction mixture, separate the upper layer of the distillate and dry it with anhydrous potassium carbonate. Distil from a 50 ml. Claisen flask and collect the fractions of boiling point (i) 145-175° (13 g.), (ii) 175-185° (8 g.) and (iii) 185-190° (largely 185-185-5°) (13 g.). Combine fractions (i) and (u), reflux for 1 hour in a small flask with 3 g. of sodium, and distil from the sodium amyloxide and excess of sodium this yields 9 5 g. of fairly pure n-amyl ether (iv). The total yield is therefore 22 - 5 g. A perfectly pure product, b.p. 184 185°, is obtained by further distillation from a Little sodium. 

Dialkylanilines, pure, from commercial products, 572 Di-n-amyl ether, 313 Di-iso-amyl ether, 313 Di-n-amyl ketone, 340 Diazoaminobenzene, 622, 627 Diazoamino-aminoazo rearrangement, 622J, 626, 627 Diazo ketone, 903, 904, 905 Diazomethane, 946, 967, 968, 969-972 determination of, 972 methylation with, 973 precautions in the use of, 968, 969 ring enlargement with, 946J, 947 Diazonium fluoborates, 594, 610, 611, 612, 613... 

SYNS AMYL ETHER n-AMYL ETHER DIAMYL ETHER DI-n-AMYL ETHER DIPENTYL ETHER ETHER, DI-n-PENTYL- l,l -OXYBISPENTANE PENTANE, l,l -OXYBIS-(9CI)... 

DI-n-AMYL ETHER see PBXOOO DIAMYL KETONE see ULAOOO DI-tert-AMYLPHENOL see DCIOOO... 

DIAMYL ETHER or DI-n-AMYL ETHER (693-65-2) Forms explosive mixture with air (flash point 134°F/56°C). Reacts violently with strong oxidizers. Ethers can form unstable and explosive peroxides upon standing. 

Commercial dIamyl ether consists principally of di-n-amyl ether and di-isMmyl ether, with mall percentages of Isomeric amyl ethers and diamylene. It is a colorless to light yellow liquid which is quite stable. It is insoluble in water but soluble in methanol, ethyl ether, ethyl acetate, ocetone, aliphatic and aramatic hydrocarbons, fixed ails, oleic and hot stearic acids, hat paraffin and carnauba waxes, the latter twa solidifying when coaled. Unlike the lower aliphotic ethers, it will not dissolve nitrocellulose when admixed with ethanol. However, a mixture af diamyl ether and 20% ethanol will dissolve ethylcellulose. 

CAS 693-65-2 EINECS/ELINCS 211-756-8 Synonyms Amyl ether n-Amyl ether Di-n-amyl ether DIpentyl ether Di-n-pentyl ether 1,r-Oxyblspentane Pentane, 1,1 -oxybis- Pentyl ether l-(Pentyloxy) pentane Pentyoxypentane Classification Ether Empirical C10H22O... 

Di-n-amyl ether. See Diamyl ether Diamylhydroquinone CAS 79-74-3 EINECS/ELINCS 201-222-2 Synonyms 2,5-Bis (1,1-dimethylpropyl)-1,4-benzenedlol 2,5-Bis (1,1-dimethylpropyl) hydroquinone DAHQ 2,5-Di (t-amyl) hydroquinone 2,5-Di-t-pentylhydroquinone Classification Hydroquinone Empirical C16H26O2 Formula (C5Hn)2(C6H20H)2 Properties Buff powd. si. sol. in water sol. in alcohol, benzene m.w. 250.42 dens. 1.05 (25 C) m.p. 176 C... 

BtetAer CfHjgO, Mw, 116. B.p., 119-20°. Ti Amyl ether see Di-n-amyl Ether. 

---