Triphenylphosphine → 7-Cyclohexyl-6-[4-(2,4-dimethyl-thiazol-5-ylmethoxy)-phenyl]-pyrazolo[1,5-a]pyrimidine-3-carbonitrile

HRID 270943Notes

Reaction equation

HRID 270943 reaction equation
[CH:1]1([C:7]2[N:12]3[N:13]=[CH:14][C:15]([C:16]#[N:17])=[C:11]3[N:10]=[CH:9][C:8]=2[C:18]2[CH:23]=[CH:22][C:21]([OH:24])=[CH:20][CH:19]=2)[CH2:6][CH2:5][CH2:4][CH2:3][CH2:2]1.[CH3:25][C:26]1[S:27][C:28]([CH2:32]O)=[C:29]([CH3:31])[N:30]=1.C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OC(C)C)=O)=NC(OC(C)C)=O>O1CCCC1>[CH:1]1([C:7]2[N:12]3[N:13]=[CH:14][C:15]([C:16]#[N:17])=[C:11]3[N:10]=[CH:9][C:8]=2[C:18]2[CH:19]=[CH:20][C:21]([O:24][CH2:32][C:28]3[S:27][C:26]([CH3:25])=[N:30][C:29]=3[CH3:31])=[CH:22][CH:23]=2)[CH2:2][CH2:3][CH2:4][CH2:5][CH2:6]1

Participants

6

Reactant 4

HCID 11776TriphenylphosphineHCID 75555Diisopropyl diazene-1,2-dicarboxylateHCID 2776250(Dimethyl-1,3-thiazol-5-yl)methanolHCID 159580147-Cyclohexyl-6-(4-hydroxyphenyl)pyrazolo[1,5-a]pyrimidine-3-carbonitrile

Product 1

HCID 184458817-Cyclohexyl-6-[4-(2,4-dimethyl-thiazol-5-ylmethoxy)-phenyl]-pyrazolo[1,5-a]pyrimidine-3-carbonitrile

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To an ice cold mixture of 40 mg (0.13 mmol) of 7-cyclohexyl-6-(4-hydroxy-phenyl)-pyrazolo[1,5-a]pyrimidine-3-carbonitrile in 3 mL of tetrahydrofuran (THF) was added 74 mg (0.52 mmol) of (2,4-dimethyl-thiazol-5-yl)-methanol, 136 mg (0.52 mmol) of triphenylphosphine (PPh3), followed by 0.102 mL (0.52 mmol) of diisopropyl azodicarboxylate (DIAD) and the mixture was allowed to warm up to rt and stirred at rt overnight. The reaction mixture was then concentrated and the residue was chromatographed on silica gel (Biotage; 10% ethyl acetate in DCM) to give desired 7-cyclohexyl-6-[4-(2,4-dimethyl-thiazol-5-ylmethoxy)-phenyl]-pyrazolo[1,5-a]pyrimidine-3-carbonitrile as indicated by 1H-NMR; LC-MS—calcd for C25H25N5OS [M++H]+: 444.18, found: 444.2.

Workup

  1. concentrationThe reaction mixture was then concentrated
  2. customthe residue was chromatographed on silica gel (Biotage; 10% ethyl acetate in DCM)

Sources & evidence

ORD record
ord-51e50121f78b40b7ae6d0e8708e7e2a2
Source dataset
uspto-grants-2008_11
Patent number
US07449488B2

Reaction notes

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