N,N,N',N'-Tetramethylethylenediamine → HCID 86657606, compound

Participants

Reaction Steps

The procedure of Example 10 was repeated except that: 1343 g (≈1.6 liters, 14.58 mole) of toluene was charged to the reactor (31 ppm residual H2O), which was further made anhydrous by the addition of 0.35 g (5.5 mmole) n-butyllithium. The anhydrous toluene was heated to 80° C., upon reaching the set point temperature, a mixture comprised of 16.33 g (0.146 mole) potassium t-butoxide, 90 g (0.98 mole) toluene and 105.71 g of N,N,N′,N′-tetramethylethylenediamine (TMEDA, 0.910 mole) was charged through the charge vessel and delivered subsurface to the gently agitated (300 rpm) toluene solution. The vessel and line were flushed with a 100 ml aliquot of toluene before charging with 56.67 g n-butyllithium solution (2.0 M, 16.5 wt % in cyclohexane, 0.146 mole). All total (the initial charge, the amount used to form the potassium t-butoxide/TMEDA solution and the amount used to flush the charge lines) 1603 g (17.4 mole) of toluene was charged to the reactor prior to initiating the styrene feed. Styrene, 3671 g (35.25 mole) was fed through the 1/16th inch OD feed line over 178 minutes such that the feed velocity was ≈18 ft/s with a feed rate of 20.62 g/min. The reaction mixture was quenched with 17.50 g (0.291 mole) acetic acid in 100 ml of toluene. An aliquot of the reaction mixture gave the following GPC analysis: Mp: 403, Mn: 493, Mw: 684, Mz: 943, PD: 1.39, σn307, n α3=2.038.

Provenance & Evidence