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

HRID 1427187Notes

Reaction equation

HRID 1427187 reaction equation
C([Li])CCC.[CH3:6][C:7]([CH3:10])([O-:9])[CH3:8].[K+:11].[CH3:12][N:13]([CH3:19])[CH2:14][CH2:15][N:16]([CH3:18])[CH3:17]>C1(C)C=CC=CC=1.O>[CH3:6][C:7]([CH3:10])([O-:9])[CH3:8].[K+:11].[CH3:12][N:13]([CH3:19])[CH2:14][CH2:15][N:16]([CH3:18])[CH3:17]

Participants

6

Reactant 3

HCID 8037N,N,N',N'-TetramethylethylenediamineHCID 23665647Potassium tert-butoxideHCID 178418339Butyllithium2×

Product 1

HCID 86657606HCID 86657606, compound

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 1140TolueneSolvent4×

Procedure

The procedure of Example 10 was repeated except that: 1250 g (≈4.4 liters, 13.57 mole) of toluene was charged to the reactor (25 ppm residual H2O), which was further made anhydrous by the addition of 0.28 g (4.4 mmole) n-butyllithium. The anhydrous toluene was heated to 80° C., upon reaching the set point temperature, a mixture comprised of 14.01 g (0.125 mole) potassium t-butoxide, 150 g (1.63 mole toluene) and 75.70 g of N,N,N′,N′-tetramethylethylenediamine (TMEDA, 0.651 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 48.70 g n-butyllithium solution (2.0 M, 16.5 wt % in cyclohexane, 0.125 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) 1570 g (17.0 mole) of toluene was charged to the reactor prior to initiating the styrene feed. Styrene, 3678 g (35.31 mole) was fed through the 1/16th inch OD feed line over 180 minutes such that the feed velocity was ≈17 ft/s with a feed rate of 20.43 g/min. The reaction mixture was quenched with 15.03 g (0.250 mole) acetic acid in 100 ml of toluene. An aliquot of the reaction mixture gave the following GPC analysis: Mp: 509, Mn: 514, Mw: 724, Mz: 1002, PD: 1.41, σn=329, nα3=1.992.

Workup

  1. additionwas charged through the charge vessel
  2. customThe vessel and line were flushed with a 100 ml aliquot of toluene
  3. additionAll total (the initial charge

Sources & evidence

ORD record
ord-a987395751db4e86a32f1ba3996e441b
Source dataset
uspto-grants-2015_01
Patent number
US08933159B2

Reaction notes

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