Triethylamine → HCID 20352652, compound

HRID 371993Notes

Reaction equation

HRID 371993 reaction equation
[C:1]1([CH:7]([C:26]2[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=2)[N:8]2[CH2:13][CH2:12][NH:11][C:10]([CH3:25])([CH2:14][C:15]3[CH:20]=[CH:19][C:18]4[O:21][CH2:22][CH2:23][O:24][C:17]=4[CH:16]=3)[CH2:9]2)[CH:6]=[CH:5][CH:4]=[CH:3][CH:2]=1.C(N(CC)CC)C.[CH2:39]([O:41][C:42](Cl)=[O:43])[CH3:40]>C1C=CC=CC=1>[C:26]1([CH:7]([C:1]2[CH:2]=[CH:3][CH:4]=[CH:5][CH:6]=2)[N:8]2[CH2:13][CH2:12][N:11]([C:42]([O:41][CH2:39][CH3:40])=[O:43])[C:10]([CH3:25])([CH2:14][C:15]3[CH:20]=[CH:19][C:18]4[O:21][CH2:22][CH2:23][O:24][C:17]=4[CH:16]=3)[CH2:9]2)[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=1

Participants

5

Reactant 3

HCID 8471TriethylamineHCID 10928Ethyl chloroformateHCID 20352656HCID 20352656, compound

Product 1

HCID 20352652HCID 20352652, compoundYield 90%

Reagents, catalysts & solvents 1

HCID 241BenzeneSolvent2×

Procedure

12.4 g of 1-diphenylmethyl-3-methyl-3-(3,4-ethylenedioxybenzyl)-piperazine (3a) are dissolved in 100 ml of dry benzene and combined with 3.3 g of triethylamine. 3.6 g of chloroformic acid ethyl ester in 20 ml of benzene are added dropwise with stirring at room temperature. After 12 hours the solution is washed free of halogen with water and evaporated to dryness in vacuum. 13.1 g (90%) of 1-diphenylmethyl-3-methyl-3-(3,4-ethylenedioxybenzyl)-4-carbethoxypiperazine are obtained (m.p. = 153° - 155° C., diisopropylether), which are dissolved in 100 ml of dry tetrahydrofuran and added dropwise with stirring over 30 minutes to a boiling suspension of 3.8 g of lithium aluminum hydride in 200 ml of tetrahydrofuran. After three hours, the mixture is combined with water and filtered. The filtrate is evaporated to dryness in vacuum. 10.7 g (93%) of 1-diphenylmethyl-3-methyl-3-(3,4-ethylenedioxybenzyl)-4-methylpiperazine are obtained.

Workup

  1. washAfter 12 hours the solution is washed free of halogen with water
  2. customevaporated to dryness in vacuum

Sources & evidence

ORD record
ord-7dc6176fe4a14b8aa00bdeeb6ea6461e
Source dataset
uspto-grants-1978_05
Patent number
US04088763

Reaction notes

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