Diethylene Glycol → HCID 131716352, compound

HRID 1492871Notes

Reaction equation

[C:1]1(=[O:7])[O:6][CH2:5][CH2:4][CH2:3][O:2]1.C(O)COCCO.C1N2CCN(CC2)C1.[CH3:23][C@@H:24]1[O:31][C:29](=[O:30])[C@H:28]([CH3:32])[O:27][C:25]1=[O:26]>>[CH3:23][C@@H:24]1[O:31][C:29](=[O:30])[C@H:28]([CH3:32])[O:27][C:25]1=[O:26].[C:1]1(=[O:7])[O:6][CH2:5][CH2:4][CH2:3][O:2]1

Participants

Reactant 4

HCID 8117Diethylene Glycol

HCID 9237Dabco

HCID 107983Lactide, L-

HCID 123834Trimethylene carbonate

Product 1

HCID 131716352HCID 131716352, compound

Conditions

Temperature: 188 °C

Procedure

Polymerization grade 1,3-dioxan-2-one (trimethylene carbonate, hereafter abbreviated TMC) (97.5 g, 0.995 mole), diethylene glycol (hereafter abbreviated DEG) (4.20×10-2 g, 4.0×10-4 mole), and Dabco T-9 catalyst (a stannous 2-ethylhexanoate catalyst formulation sold by Air Products, Inc., hereafter abbreviated T-9) (1.35×10-2 g, 3.3×10-5 moles) were combined in a stirred reactor at 182° C. The temperature was raised to 188° C. and the mixture was stirred for 11/2 hours at this temperature. Polymerization grade l-lactide (52.5 g, 0.364 mole) was added and the temperature was increased to 200° C. After 45 minutes, the polymer was discharged from the reactor and allowed to solidify.

Workup

custom, hereafter abbreviated T-9) (1.35×10-2 g, 3.3×10-5 moles) were combined in a stirred reactor at 182° C
additionwas added
temperaturethe temperature was increased to 200° C
waitAfter 45 minutes

Sources & evidence

ORD record: ord-952d1af47cfe43f287a70b72498e01ab
Source dataset: uspto-grants-1994_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US05376102

Reaction notes

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