Triethylamine → 7-Chloro-3-[1-(6,7-dimethoxy-4-quinazolinyl)-4-piperidinyl]-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxoquinazoline

HRID 2257723Notes

Reaction equation

HRID 2257723 reaction equation
[Cl:1][C:2]1[CH:11]=[C:10]2[C:5]([C:6](=[O:26])[N:7]([CH:15]3[CH2:20][CH2:19][N:18]([C:21]([O:23][CH2:24][CH3:25])=[O:22])[CH2:17][CH2:16]3)[C:8](=[O:14])[N:9]2[CH2:12][CH3:13])=[CH:4][C:3]=1[N+:27]([O-:29])=[O:28].Br.[Cl:31][C:32]1[CH:41]=[C:40]2[C:35]([C:36](=[O:51])[N:37]([CH:45]3[CH2:50][CH2:49][NH:48][CH2:47][CH2:46]3)[C:38](=[O:44])[N:39]2[CH2:42][CH3:43])=[CH:34][C:33]=1[N+:52]([O-:54])=[O:53].Cl[C:56]1[C:65]2[C:60](=[CH:61][C:62]([O:68][CH3:69])=[C:63]([O:66][CH3:67])[CH:64]=2)[N:59]=[CH:58][N:57]=1.C(N(CC)CC)C>CO.O>[Cl:1][C:2]1[CH:11]=[C:10]2[C:5]([C:6](=[O:26])[N:7]([CH:15]3[CH2:20][CH2:19][N:18]([C:21]([O:23][CH2:24][CH3:25])=[O:22])[CH2:17][CH2:16]3)[C:8](=[O:14])[N:9]2[CH2:12][CH3:13])=[CH:4][C:3]=1[N+:27]([O-:29])=[O:28].[Cl:31][C:32]1[CH:41]=[C:40]2[C:35]([C:36](=[O:51])[N:37]([CH:45]3[CH2:50][CH2:49][N:48]([C:56]4[C:65]5[C:60](=[CH:61][C:62]([O:68][CH3:69])=[C:63]([O:66][CH3:67])[CH:64]=5)[N:59]=[CH:58][N:57]=4)[CH2:47][CH2:46]3)[C:38](=[O:44])[N:39]2[CH2:42][CH3:43])=[CH:34][C:33]=1[N+:52]([O-:54])=[O:53]

Participants

8

Reactant 4

HCID 8471TriethylamineHCID 27693644-Chloro-6,7-dimethoxyquinazolineHCID 229234127-Chloro-3-(1-ethoxycarbonyl-4-piperidinyl)-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxoquinazoline2×HCID 229234787-Chloro-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxo-3-(4-piperidinyl)-quinazoline hydrobromide

Product 2

HCID 229233907-Chloro-3-[1-(6,7-dimethoxy-4-quinazolinyl)-4-piperidinyl]-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxoquinazolineHCID 229234127-Chloro-3-(1-ethoxycarbonyl-4-piperidinyl)-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxoquinazoline

Reagents, catalysts & solvents 2

HCID 887MethanolSolventHCID 962WaterSolvent

Procedure

The procedure similar to that described in Example 15 was repeated, except that 200.0 mg (0.47 mmol) of 7-chloro-3-(1-ethoxycarbonyl-4-piperidinyl)-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxoquinazoline (Compound t) was used in place of Compound a, whereby 150.6 mg of crude 7-chloro-1-ethyl-1,2,3,4-tetrahydro-6-nitro-2,4-dioxo-3-(4-piperidinyl)-quinazoline hydrobromide was obtained. The product (145.0 mg, 0.31 mmol) was suspended in 10 ml of methanol, and 70 mg (0.31 mmol) of 4-chloro-6,7-dimethoxyquinazoline and 0.11 ml (0.78 mmol) of triethylamine were added thereto, followed by heating under reflux for 1 hour. After the reaction mixture was cooled to room temperature, water was added, and the precipitated crystals were collected by filtration, washed successively with water, methanol, and ether, and dried. Recrystallization of the resulting crude crystals from methanol/water gave 144.6 mg (yield from Compound t: 60%) of Compound 36 as pale yellow crystals.

Workup

  1. customwas obtained
  2. temperatureby heating
  3. temperatureunder reflux for 1 hour
  4. filtrationthe precipitated crystals were collected by filtration
  5. washwashed successively with water, methanol, and ether
  6. customdried
  7. customRecrystallization of the resulting crude crystals from methanol/water
  8. customgave

Sources & evidence

ORD record
ord-c3ed86fac644484e9b583e00691b227f
Source dataset
uspto-grants-1997_08
Patent number
US05658917

Reaction notes

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