Ethers, Sulfides and Thiols

1 Methyl Propargvl Ether from Propargvt Alcohol, Dimethyl Sulfate and NaOll 

Apparatus 2-1 round-bottomed, three-necked flask, equipped with a dropping funnel, a gas-tight mechanical stiner (fig 3), an efficient reflux condenser and a thermometer (combined with the reflux condenser or dropping funnel). 

HCaCCH2OC2H5, njj(20 ) 1.4039, b.p. 80 C/760 mmHg, is obtained in a similar way (yields 70%) using Et2S04. During the addition of this reagent, the temperature of the 

The use of potassium hydroxide is less convenient since a very thick suspension of K2S04 is formed. 

4-Dimethoxy-2-butyne from 1,4-Butynediol, Dimethyl Sulfate and NaOH 

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