Fluoride Ion → HCID 44158703, compound

HRID 1926360Notes

Reaction equation

HRID 1926360 reaction equation
[S:1]1[C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=[C:2]1[C:10]1[C:11]([NH2:25])=[N:12][CH:13]=[C:14](B2OC(C)(C)C(C)(C)O2)[CH:15]=1.C[O:27][C:28]([C@H:30]1[CH2:34][C@H:33]([N:35]2[CH:39]=[C:38](I)[CH:37]=[N:36]2)[CH2:32][N:31]1C(OCC1C=CC=CC=1)=O)=[O:29].[F-].O1CCOCC1>C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1.O>[NH2:25][C:11]1[N:12]=[CH:13][C:14]([C:38]2[CH:37]=[N:36][N:35]([C@@H:33]3[CH2:32][NH:31][C@@H:30]([C:28]([OH:29])=[O:27])[CH2:34]3)[CH:39]=2)=[CH:15][C:10]=1[C:2]1[S:1][C:5]2[CH:6]=[CH:7][CH:8]=[CH:9][C:4]=2[N:3]=1

Participants

7

Reactant 4

HCID 28179Fluoride IonHCID 312751,4-DioxaneHCID 574165133-(1,3-Benzothiazol-2-yl)-5-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)pyridin-2-amineHCID 67520856HCID 67520856, compound

Product 1

HCID 44158703HCID 44158703, compound

Reagents, catalysts & solvents 2

HCID 178418397HCID 178418397, compoundCatalystHCID 962WaterSolvent

Conditions

Temperature
60 °C

Procedure

A mixture of 3-benzothiazol-2-yl-5-(4,4,5,5-tetramethyl-[1,3,2]dioxaborolan-2-yl)-pyridin-2-ylamine (BB8) (151 mg, 0.428 mmol), (2R,4S)-4-(4-iodopyrazol-1-yl)-pyrrolidine-1,2-dicarboxylic acid 1-benzyl ester 2-methyl ester (177 mg, 0.389 mmol), Pd(PPh3)4 (20 mg, 0.02 mmol), potass fluoride (67.8 mg, 1.17 mmol), and 4:1 dioxane:water (4 mL) was heated in the microwave reactor at 85° C. for 30 min. The solution was dry-loaded onto silica gel for column chromatography, eluting with 2→5% MeOH/DCM. The fractions containing the product were concentrated in vacuo and dissolved in conc. HCl. The material was heated to 60° C. for 3 h in a sealed tube. The solvent was removed on the corrosive pump to afford the title compound as an orange solid. 1H NMR (400 MHz, CD3OD): δ=2.55-2.67 (m, 1H), 2.74 (br. s., 1H), 3.76-3.87 (m, 2H), 4.45 (t, J=8.6 Hz, 1H), 5.25 (dd, J=6.1, 3.0 Hz, 1H), 7.44 (t, J=7.6 Hz, 1H), 7.49-7.55 (m, 1H), 7.88 (s, 1H), 7.97 (d, J=7.6 Hz, 1H), 8.02 (d, J=7.8 Hz, 1H), 8.06 (s, 1H), 8.16 (d, J=2.0 Hz, 1H), 8.30 (d, J=2.0 Hz, 1H).

Workup

  1. washeluting with 2→5% MeOH/DCM
  2. additionThe fractions containing the product
  3. concentrationwere concentrated in vacuo
  4. dissolutiondissolved in conc. HCl
  5. customThe solvent was removed on the corrosive pump

Sources & evidence

ORD record
ord-a8d56c16e7c544ba98894abb4e2122bf
Source dataset
uspto-grants-2012_05
Patent number
US08178668B2

Reaction notes

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