epsilon-CAPROLACTONE → L-lactide epsilon-caprolactone

HRID 1438869Notes

Reaction equation

HRID 1438869 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>C1C=CC=CC=1>[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 241BenzeneSolvent

Procedure

The procedure of Example II is repeated except that 329 grams of L-(-)-lactide, 17.3 grams of epsilon caprolactone and 3.5 ml of benzene containing 0.7 gram of stannous caprylate are placed in the ampoule, evacuated, sealed and heated for 48 hours at 105° to 144° C. The copolymer thus obtained can be melt-molded by conventional thermoplastic techniques. The copolymer is an opaque, light yellow copolymer having a substantial melting-point endotherm at 165° C. Physical properties are listed in more detail in Table 1.

Workup

  1. customevacuated
  2. customsealed
  3. temperatureheated for 48 hours at 105° to 144° C
  4. customThe copolymer thus obtained can
  5. customat 165° C

Sources & evidence

ORD record
ord-a055f1c776a44e3bb41a7411424628df
Source dataset
uspto-grants-1977_11
Patent number
US04057537

Reaction notes

Loading…