Lawesson's reagent → ethyl (S)-11,12,13,13a-tetrahydro-9-thioxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate

HRID 67327

Reaction equation

HRID 67327 reaction equation
O=[C:2]1[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=2[N:6]2[CH:13]=[N:14][C:15]([C:16]([O:18][CH2:19][CH3:20])=[O:17])=[C:5]2[C@@H:4]2[CH2:21][CH2:22][CH2:23][N:3]12.COC1C=CC(P2(=S)SP(=S)(C3C=CC(OC)=CC=3)[S:33]2)=CC=1>C1(C)C=CC=CC=1>[S:33]=[C:2]1[C:8]2[CH:9]=[CH:10][CH:11]=[CH:12][C:7]=2[N:6]2[CH:13]=[N:14][C:15]([C:16]([O:18][CH2:19][CH3:20])=[O:17])=[C:5]2[C@@H:4]2[CH2:21][CH2:22][CH2:23][N:3]12

Participants

4

Reactant 2

HCID 87949Lawesson's reagentHCID 10041121Ethyl (7S)-12-oxo-2,4,11-triazatetracyclo[11.4.0.02,6.07,11]heptadeca-1(17),3,5,13,15-pentaene-5-carboxylate

Product 1

HCID 53734564ethyl (S)-11,12,13,13a-tetrahydro-9-thioxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 1140TolueneSolvent

Procedure

A mixture of 5.0 g (0.0161 mol) of ethyl (S)-11,12,13,13a-tetrahydro-9-oxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate and 3.46 g (0.0086 mol) of 2,4-bis(p-methoxyphenyl)-1,3,2,4-dithiadiphosphetane-2,4-disulphide is heated to boiling under reflux for 1.5 hours with 30 ml of toluene. This solution is chromatographed on silica gel using ethyl acetate for the elution. There is obtained ethyl (S)-11,12,13,13a-tetrahydro-9-thioxo-9H-imidazo[1,5-a]pyrrolo[2,1-c][1,4]benzodiazepine-1-carboxylate which is recrystallised from 180 ml of ethyl acetate and then melts at 227°-229° C.

Workup

  1. temperatureis heated
  2. customThis solution is chromatographed on silica gel
  3. washfor the elution

Sources & evidence

ORD record
ord-cfb0ec5531aa423c8e92c7481a90f3ac
Source dataset
uspto-grants-1982_08
Patent number
US04346030

Linked notes

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