[NH2:1][CH2:2][CH2:3][CH2:4][Si:5]([O:10][CH3:11])([O:8][CH3:9])[O:6][CH3:7].C(N(CC)CC)C.[CH3:19][Si:20](Cl)([CH3:22])[CH3:21]>ClCCl>[CH3:19][Si:20]([CH3:22])([CH3:21])[N:1]([CH2:2][CH2:3][CH2:4][Si:5]([O:10][CH3:11])([O:6][CH3:7])[O:8][CH3:9])[Si:20]([CH3:22])([CH3:21])[CH3:19]Aminopropyltrimethoxysilane (0.398 mol) and triethylamine (100 mL) were dissolved in dichloromethane (200 mL) in a round-bottom flask and trimethylsilyl chloride (0.800 mol) was added in a dropwise manner. After the addition was completed, the mixture was stirred at room temperature for 24 hours. Upon completion of reaction, N,N-bis(trimethylsilyl)aminopropyltrimethoxysilane (yield: 89%) was obtained through concentration under reduced pressure and fractional distillation. 1H and 13C NMR spectroscopic data of the purified N,N-bis(trimethylsilyl)aminopropyltrimethoxysilane are as follows.
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