Pyridine → HCID 52938801, compound

HRID 1809494Notes

Reaction equation

HRID 1809494 reaction equation
[OH:1][C@H:2]1[C:10]2[C:5](=[C:6]([C:11]3[N:15]=[C:14]([C:16]4[CH:17]=[CH:18][C:19]([O:24][CH:25]([CH3:27])[CH3:26])=[C:20]([CH:23]=4)[C:21]#[N:22])[O:13][N:12]=3)[CH:7]=[CH:8][CH:9]=2)[CH2:4][CH2:3]1.N1C=CC=CC=1.[C:34](Cl)(=[O:39])[C:35]([CH3:38])([CH3:37])[CH3:36]>C(Cl)Cl>[C:34]([O:1][C@H:2]1[C:10]2[C:5](=[C:6]([C:11]3[N:15]=[C:14]([C:16]4[CH:17]=[CH:18][C:19]([O:24][CH:25]([CH3:27])[CH3:26])=[C:20]([C:21]#[N:22])[CH:23]=4)[O:13][N:12]=3)[CH:7]=[CH:8][CH:9]=2)[CH2:4][CH2:3]1)(=[O:39])[C:35]([CH3:38])([CH3:37])[CH3:36]

Participants

5

Reactant 3

HCID 1049PyridineHCID 62493Pivaloyl chlorideHCID 52938926HCID 52938926, compound

Product 1

HCID 52938801HCID 52938801, compoundYield 52%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a flask containing (R)-5-(3-(1-hydroxy-2,3-dihydro-1H-inden-4-yl)-1,2,4-oxadiazol-5-yl)-2-isopropoxybenzonitrile 5 (36 mg, 0.10 mmol) in DCM (1 mL) was added pyridine (24 μL, 0.3 mmol) and pivaloyl chloride (37 μL, 0.3 mmol). The reaction was stirred at room temperature for 4 days. The crude reaction mixture was washed with saturated sodium bicarbonate, dried over magnesium sulfate, and purified by chromatography (EA/hexane) to give 23 mg (52%) of (R)-4-(5-(3-cyano-4-isopropoxyphenyl)-1,2,4-oxadiazol-3-yl)-2,3-dihydro-1H-inden-1-yl pivalate 14 as a white solid. LCMS-ESI (m/z) calculated for C26H27N3O4: 445.2, tR=4.7 min. 1H NMR (400 MHz, CDCl3) δ 8.37 (d, J=2.2, 1H), 8.28 (dd, J=8.9, 2.2, 1H), 8.12-8.05 (m, 1H), 7.46 (d, J=7.4, 1H), 7.34 (t, J=7.6, 1H), 7.06 (d, J=9.0, 1H), 6.19 (dd, J=7.3, 4.6, 1H), 4.73 (hept, J=6.1, 1H), 3.44 (ddd, J=17.5, 8.7, 5.4, 1H), 3.24 (ddd, J=17.5, 8.6, 5.7, 1H), 2.56 (tdd, J=8.6, 7.4, 5.4, 1H), 2.12-1.99 (m, 1H), 1.41 (d, J=6.1, 6H), 1.14 (s, 9H).

Workup

  1. customThe crude reaction mixture
  2. washwas washed with saturated sodium bicarbonate
  3. dry with materialdried over magnesium sulfate
  4. custompurified by chromatography (EA/hexane)

Sources & evidence

ORD record
ord-bef4b0794b90465bb4951c893a0b5b75
Source dataset
uspto-grants-2013_01
Patent number
US08362048B2

Reaction notes

Loading…