Formaldehyde → HCID 53312154, compound

HRID 924339Notes

Reaction equation

HRID 924339 reaction equation
[C:1]([C@@H:9]1[CH2:13][CH:12]([CH2:14][C:15]2[CH:20]=[CH:19][C:18]([C:21]3[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=3)=[CH:17][CH:16]=2)[N:11](/[CH:27]=[CH:28]/[C:29]2[CH:34]=[CH:33][CH:32]=[CH:31][CH:30]=2)[C:10]1=[O:35])(=O)C1C=CC=CC=1.C=O.CCN(C(C)C)C(C)C.[Cl-].[Li+]>O1CCCC1.C1(C)C=CC=CC=1>[C:18]1([C:21]2[CH:22]=[CH:23][CH:24]=[CH:25][CH:26]=2)[CH:17]=[CH:16][C:15]([CH2:14][C@H:12]2[N:11](/[CH:27]=[CH:28]/[C:29]3[CH:30]=[CH:31][CH:32]=[CH:33][CH:34]=3)[C:10](=[O:35])[C:9](=[CH2:1])[CH2:13]2)=[CH:20][CH:19]=1

Participants

7

Reactant 4

HCID 712FormaldehydeHCID 81531DiisopropylethylamineHCID 433294Lithium ChlorideHCID 86673650HCID 86673650, compound

Product 1

HCID 53312154HCID 53312154, compound

Reagents, catalysts & solvents 2

HCID 1140TolueneSolventHCID 8028TetrahydrofuranSolvent

Procedure

(S)-3-Benzoyl-5-biphenyl-4-ylmethyl-1-((E)-styryl)-pyrrolidin-2-one (4a, R1=styryl, R4=phenyl) (54.3 g, 118.8 mmol) is dissolved in 120 mL of anhydrous tetrahydrofuran, add paraformaldehyde (4.28 g, 142.6 mmol), iPr2NEt (20.0 g, 154.5 mmol) and anhydrous Lithium chloride (2.56 g, 59.4 mmol), reflux for 2 h under nitrogen atmosphere. The reaction mixture is cooled to room temperature, add 200 mL of toluene, wash with 5% HCl(aq), saturated Na2CO3 and brine, dry over anhydrous Na2SO4, evaporate the solvent under vacuum to give (R)-5-Biphenyl-4-ylmethyl-3-methylene-1-((E)-styryl)-pyrrolidin-2-one (1a, R1=styryl). Spectroscopic data as Example 23, Method 1.

Workup

  1. temperaturereflux for 2 h under nitrogen atmosphere
  2. washwash with 5% HCl(aq), saturated Na2CO3 and brine
  3. dry with materialdry over anhydrous Na2SO4
  4. customevaporate the solvent under vacuum

Sources & evidence

ORD record
ord-3acb82967d954726b3f6f0242766c85c
Source dataset
uspto-grants-2016_03
Patent number
US09278908B2

Reaction notes

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