epsilon-CAPROLACTONE → L-lactide epsilon-caprolactone

HRID 236220

Reaction equation

HRID 236220 reaction equation
[CH3:1][C@@H:2]1[O:9][C:7](=[O:8])[C@H:6]([CH3:10])[O:5][C:3]1=[O:4].[C:11]1(=[O:18])[O:17][CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]1>CCCCC(C([O-])=O)CC.CCCCC(C([O-])=O)CC.[Sn+2]>[CH3:1][C@@H:2]1[O:9][C:7](=[O:8])[C@H:6]([CH3:10])[O:5][C:3]1=[O:4].[C:11]1(=[O:18])[O:17][CH2:16][CH2:15][CH2:14][CH2:13][CH2:12]1

Participants

4

Reactant 2

HCID 10401epsilon-CAPROLACTONEHCID 107983Lactide, L-

Product 1

HCID 131710947L-lactide epsilon-caprolactone

Reagents, catalysts & solvents 1

HCID 93182-ethylhexanoic acid tin(II) saltCatalyst

Procedure

The procedure of Example II is repeated except that 15 grams of L-(-)-lactide, 35 grams of epsilon caprolactone and 0.0105 grams of pure stannous octoate catalyst are blanketed with dry nitrogen in a glass flask and heated for 45 hours at 140° to 142° C. The copolymer is tough and elastic and has good tensile strength and elongation properties. The copolymer has

Workup

  1. customare blanketed with dry nitrogen in a glass flask
  2. temperatureheated for 45 hours at 140° to 142° C

Sources & evidence

ORD record
ord-e88375e22db7491381c44d47cb8c1b75
Source dataset
uspto-grants-1987_02
Patent number
US04643734

Linked notes

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