3-Aminobenzamide → Cbda 3-aba

HRID 1781962Notes

Reaction equation

HRID 1781962 reaction equation
[CH:1]12[C:13](=[O:14])[O:12][C:10](=[O:11])[CH:2]1[CH:3]1[C:8](=[O:9])[O:7][C:5](=[O:6])[CH:4]12.[CH:15]1[CH:20]=[C:19]([NH2:21])[CH:18]=[C:17]([C:22]([NH2:24])=[O:23])[CH:16]=1>CN1C(=O)CCC1>[CH:2]12[C:10](=[O:11])[O:12][C:13](=[O:14])[CH:1]1[CH:4]1[C:5](=[O:6])[O:7][C:8](=[O:9])[CH:3]12.[CH:15]1[CH:20]=[C:19]([NH2:21])[CH:18]=[C:17]([C:22]([NH2:24])=[O:23])[CH:16]=1

Participants

4

Reactant 2

HCID 16453-AminobenzamideHCID 1072801,2,3,4-Cyclobutanetetracarboxylic dianhydride

Product 1

HCID 131727341Cbda 3-aba

Reagents, catalysts & solvents 1

HCID 13387N-methyl-2-pyrrolidoneSolvent2×

Procedure

19.22 g (0.098 mol) of CBDA and 12.22 g (0.1 mol) of 3-ABA were reacted in 283 g of NMP at room temperature for 5 hours to prepare a polyamic acid solution. The polymerization reaction proceeded easily and uniformly, and the molecular weights were measured in the same manner as in Preparation Example 1 and as a result, a solution of a polyamic acid having a number average molecular weight of 28,114 and a weight average molecular weight of 45,429 was obtained. Further, to this solution, poor solvents BCS and NMP were added so that the polyamic acid concentration would be 5 mass % and the BCS concentration would be 20 mass % to prepare a liquid crystal aligning agent.

Workup

  1. customto prepare a polyamic acid solution
  2. customThe polymerization reaction
  3. customuniformly, and the molecular weights were measured in the same manner as in Preparation Example 1 and as a result
  4. customa weight average molecular weight of 45,429 was obtained
  5. concentrationthe BCS concentration
  6. customto prepare a liquid crystal aligning agent

Sources & evidence

ORD record
ord-d84299200b2b4f29be7d2236be2306f3
Source dataset
uspto-grants-2009_03
Patent number
US07498068B2

Reaction notes

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