Ethylenediamine → 3-[3-(Hydroxymethyl)cyclopentyl]-3-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]propanenitrile

HRID 40916Notes

Reaction equation

HRID 40916 reaction equation
[OH:1][CH2:2][CH:3]1[CH2:7][CH2:6][CH:5]([CH:8]([N:12]2[CH:16]=[C:15]([C:17]3[C:18]4[CH:25]=[CH:24][N:23](COCC[Si](C)(C)C)[C:19]=4[N:20]=[CH:21][N:22]=3)[CH:14]=[N:13]2)[CH2:9][C:10]#[N:11])[CH2:4]1.C(O)(C(F)(F)F)=O.C(N)CN>C(Cl)Cl>[OH:1][CH2:2][CH:3]1[CH2:7][CH2:6][CH:5]([CH:8]([N:12]2[CH:16]=[C:15]([C:17]3[C:18]4[CH:25]=[CH:24][NH:23][C:19]=4[N:20]=[CH:21][N:22]=3)[CH:14]=[N:13]2)[CH2:9][C:10]#[N:11])[CH2:4]1

Participants

5

Reactant 3

HCID 3301EthylenediamineHCID 6422Trifluoroacetic acidHCID 574776573-[3-(Hydroxymethyl)cyclopentyl]-3-[4-(7-[2-(trimethylsilyl)ethoxy]methyl-7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]propanenitrile

Product 1

HCID 574776563-[3-(Hydroxymethyl)cyclopentyl]-3-[4-(7H-pyrrolo[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]propanenitrile

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To 3-[3-(hydroxymethyl)cyclopentyl]-3-[4-(7-[2-(trimethylsilyl)ethoxy]methyl-7H-pyrrolo-[2,3-d]pyrimidin-4-yl)-1H-pyrazol-1-yl]propanenitrile (60.4 mg, 0.129 mmol) dissolved in CH2Cl2 (2.0 mL) was added TFA (1.0 mL) and the reaction was stirred for 1 hour at which point LCMS indicated complete cleavage to the N-hydroxymethyl intermediate (m/z=367). The trifluoroacetate ester of the hydroxymethyl of the cyclopentyl ring was also observed (m/z=463). The solvent was removed and to the residue was added methanol (1.0 mL) followed by ethylenediamine (80 μL, 1.19 mmol). The resulting mixture was stirred for 16 hours at which point LCMS indicated complete reaction to the desired product. The solvent was removed and the residue was purified by chiral HPLC to provide four distinct diastereomers (20.2 mg total of four isomers, 46%). NOE experiments suggest that all isomers have cis geometry on the cyclopentyl ring. Isomers 1 and 2: 1H NMR (400 MHz, CD3OD): δ 8.65 (s, 1H), 8.62 (s, 1H), 8.38 (s, 1H), 7.50 (d, 1H), 6.95 (d, 1H), 4.51 (m, 1H), 3.40 (m, 2H), 3.22 (m, 1H), 3.11 (m, 1H), 2.61 (m, 1H), 2.10 (m, 1H), 1.94 (m, 1H), 1.82 (m, 1H), 1.6-1.4 (m, 3H), 1.03 (m, 1H). Isomers 3 and 4: 1H NMR (400 MHz, CD3OD): δ 8.66 (s, 1H), 8.62 (s, 1H), 8.37 (s, 1H), 7.50 (d, 1H), 6.95 (d, 1H), 4.51 (m, 1H), 3.46 (m, 2H), 3.21 (m, 1H), 3.11 (m, 1H), 2.61 (m, 1H), 2.22 (m, 1H), 2.09 (m, 1H), 1.71 (m, 1H), 1.55-1.25 (m, 3H), 1.04 (m, 1H). MS (EI) m/z=337.1 (M+H).

Workup

  1. customThe solvent was removed and to the residue
  2. additionwas added methanol (1.0 mL)
  3. stirringThe resulting mixture was stirred for 16 hours at which point LCMS

Sources & evidence

ORD record
ord-9290e9ac0cc64f5f93f81bd8b7a7ee95
Source dataset
uspto-grants-2013_09
Patent number
US08530485B2

Reaction notes

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