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1,2-Dichloroethane → 7-(2-(((1,1-Dimethylethoxy)carbonyl)amino)-1-oxo-3-((triphenylmethyl)thio)-propyl)-2-(2-methoxyphenyl)-5,6,7,8-tetrahydro-8-(2-((triphenylmethyl)thio)ethyl)-imidazo[1,2-a]pyrazine

HRID 901126
Notes
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Reaction equation

HRID 901126 reaction equation
[CH3:1][O:2][C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[N:10]=[C:11]2[CH:16]([CH2:17][CH2:18][S:19][C:20]([C:33]3[CH:38]=[CH:37][CH:36]=[CH:35][CH:34]=3)([C:27]3[CH:32]=[CH:31][CH:30]=[CH:29][CH:28]=3)[C:21]3[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=3)[NH:15][CH2:14][CH2:13][N:12]2[CH:39]=1.[NH:40]([C:66]([O:68][C:69]([CH3:72])([CH3:71])[CH3:70])=[O:67])[C@H:41]([C:63](O)=[O:64])[CH2:42][S:43][C:44]([C:57]1[CH:62]=[CH:61][CH:60]=[CH:59][CH:58]=1)([C:51]1[CH:56]=[CH:55][CH:54]=[CH:53][CH:52]=1)[C:45]1[CH:50]=[CH:49][CH:48]=[CH:47][CH:46]=1.CN1CCOCC1.C1C=NC2N(O)N=NC=2C=1.C(Cl)CCl>C1COCC1>[CH3:71][C:69]([CH3:72])([O:68][C:66]([NH:40][CH:41]([CH2:42][S:43][C:44]([C:57]1[CH:62]=[CH:61][CH:60]=[CH:59][CH:58]=1)([C:51]1[CH:52]=[CH:53][CH:54]=[CH:55][CH:56]=1)[C:45]1[CH:46]=[CH:47][CH:48]=[CH:49][CH:50]=1)[C:63]([N:15]1[CH2:14][CH2:13][N:12]2[CH:39]=[C:9]([C:4]3[CH:5]=[CH:6][CH:7]=[CH:8][C:3]=3[O:2][CH3:1])[N:10]=[C:11]2[CH:16]1[CH2:17][CH2:18][S:19][C:20]([C:33]1[CH:34]=[CH:35][CH:36]=[CH:37][CH:38]=1)([C:27]1[CH:28]=[CH:29][CH:30]=[CH:31][CH:32]=1)[C:21]1[CH:26]=[CH:25][CH:24]=[CH:23][CH:22]=1)=[O:64])=[O:67])[CH3:70]
ParticipantsProcedureWorkupSources & evidenceReaction notes

Participants

7

Reactant 5

HCID 111,2-DichloroethaneHCID 79724-MethylmorpholineHCID 181649HOAtHCID 11167161N-((1,1-Dimethylethoxy)carbonyl)-S-(triphenylmethyl)-L-cysteineHCID 220168072-(2-Methoxyphenyl)-5,6,7,8-tetrahydro-8-(2-((triphenylmethyl)thio)ethyl)-imidazo[1,2-a]pyrazine

Product 1

HCID 22016823
7-(2-(((1,1-Dimethylethoxy)carbonyl)amino)-1-oxo-3-((triphenylmethyl)thio)-propyl)-2-(2-methoxyphenyl)-5,6,7,8-tetrahydro-8-(2-((triphenylmethyl)thio)ethyl)-imidazo[1,2-a]pyrazine
Yield 97%

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A mixture of the product from Step 13.g. (compound xxi, where R2, R3, R5, R6, and R7 are H, R4 is 2-methoxyphenyl, and n is 1) (1.30 g, 2.45 mmol), Boc-(L)-Cys(Trt)-OH (1.14 g, 2.45 mmol), NMM (270 uL, 2.45 mmol), and HOAt (333 mg, 2.45 mmol) in THF (20 ml) was treated with EDC (470 mg, 2.45 mmol) at room temperature under N2. The reaction was stirred overnight and then concentrated under reduced pressure. Saturated NaHCO3 solution (25 ml) was added and the product was extracted with a 3:2 mixture of hexanes:EtOAc. The extracts were applied to a silica gel column and the product was eluted with 3:2/hexanes:EtOAc. Product fractions were combined and concentrated under reduced pressure to obtain a white foam (2.31 g, 97%) which was used without further purification. Mass spec. 977.6 MH+.

Workup

  1. concentrationconcentrated under reduced pressure
  2. additionSaturated NaHCO3 solution (25 ml) was added
  3. extractionthe product was extracted with a 3:2 mixture of hexanes
  4. washthe product was eluted with 3:2/hexanes
  5. concentrationconcentrated under reduced pressure

Sources & evidence

ORD record
ord-46c39abe7c4743a8b5db35728d879041
Source dataset
uspto-grants-2008_04
DOI
10.6084/m9.figshare.5104873.v1
Patent number
US07361656B2

Reaction notes

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On this pageParticipantsProcedureWorkupSources & evidenceReaction notes