Di Yuan-yuan
2003
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Journal
Fine chemicals
Abstract
N,N-Diisopropylethylamine(DIPEA) was prepared from diisopropylamine (DIPA) and diethyl sulfate (Et_2SO_4).The optimized conditions are that feed mole ratio n(DIPA)∶n(Et_2SO_4)=1.2∶1,dropping time for diethyl sulfate is 1 h and the refluxed time is 4 h.The highest reaction temperature is 130 ℃ and the mole yield of product x(DIPEA)=81.4%.After distillation,purity of the product w(DIPEA) ≥99.8%.