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The preparation of ethers is one of the most fundamental and frequently used important reactions in synthetic organic chemistry.The first example of the formation of carbon-oxygen single bonds,the Williamson ether synthesis,has been widely used for the preparation of symmetrical and unsymmetrical ethers.The preparation of symmetrical formaldehyde acetals is a kind of reaction to synthesis ethers.These compounds are accessible using methods suffered from the long time reaction and high temeperature.