Pyrrolidine → (S)-8-chloro-1-(4-pyrrolidin-1-ylmethyl-thiazol-2-yl)-11,12,13,13a-tetrahydro-9H-imidazo-[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepin-9-one

HRID 1737366Notes

Reaction equation

HRID 1737366 reaction equation
[Cl:1][C:2]1[C:7]2[C:8](=[O:26])[N:9]3[CH2:25][CH2:24][CH2:23][C@H:10]3[C:11]3[N:12]([CH:13]=[N:14][C:15]=3[C:16]3[S:17][CH:18]=[C:19]([CH2:21]Cl)[N:20]=3)[C:6]=2[CH:5]=[CH:4][CH:3]=1.[NH:27]1[CH2:31][CH2:30][CH2:29][CH2:28]1>O1CCCC1>[Cl:1][C:2]1[C:7]2[C:8](=[O:26])[N:9]3[CH2:25][CH2:24][CH2:23][C@H:10]3[C:11]3[N:12]([CH:13]=[N:14][C:15]=3[C:16]3[S:17][CH:18]=[C:19]([CH2:21][N:27]4[CH2:31][CH2:30][CH2:29][CH2:28]4)[N:20]=3)[C:6]=2[CH:5]=[CH:4][CH:3]=1

Participants

4

Reactant 2

HCID 31268PyrrolidineHCID 70067673(S)-8-chloro-1-(4-chloromethyl-thiazol-2-yl)-11,12,13,13a-tetrahydro-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepin-9-one

Product 1

HCID 70068062(S)-8-chloro-1-(4-pyrrolidin-1-ylmethyl-thiazol-2-yl)-11,12,13,13a-tetrahydro-9H-imidazo-[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepin-9-oneYield 44%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of 1.3 g (0.0032mol) of (S)-8-chloro-1-(4-chloromethyl-thiazol-2-yl)-11,12,13,13a-tetrahydro-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepin-9-one in 15 ml of tetrahydrofuran was treated with 4 ml (0.048 mol) of pyrrolidine and stirred at 50° for 96 hrs. All volatiles were removed in a water-jet vacuum and the residue was taken up with ethyl acetate and water. The organic phase was dried over magnesium sulphate, concentrated and the residue remaining was chromatographed over silica gel with methylene chloride/methanol 95:5 as the eluent. After recrystallization from ethyl acetate there was obtained 0.62 g (44%) of (S)-8-chloro-1-(4-pyrrolidin-1-ylmethyl-thiazol-2-yl)-11,12,13,13a-tetrahydro-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepin-9-one in the form of white crystals; m.p. 213-214° and [α]D20 =-71.2° (MeOH, c=1%).

Workup

  1. customAll volatiles were removed in a water-jet vacuum
  2. dry with materialThe organic phase was dried over magnesium sulphate
  3. concentrationconcentrated
  4. customthe residue remaining was chromatographed over silica gel with methylene chloride/methanol 95:5 as the eluent
  5. customAfter recrystallization from ethyl acetate

Sources & evidence

ORD record
ord-6149be903ab743caa3c6dcafce98e107
Source dataset
uspto-grants-1999_10
Patent number
US05962450

Reaction notes

Loading…