(S)-ethyl 2-(5-(4-(benzyloxy)phenyl)-4-(4,4-dimethylpiperidin-1-yl)-2,6-dimethylpyridin-3-yl)-2-(tert-butoxy)acetate → (S)-ethyl 2-(tert-butoxy)-2-(4-(4,4-dimethylpiperidin-1-yl)-5-(4-hydroxyphenyl)-2,6-dimethylpyridin-3-yl)acetate

HRID 718346Notes

Reaction equation

HRID 718346 reaction equation
C([O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2[C:16]([N:34]3[CH2:39][CH2:38][C:37]([CH3:41])([CH3:40])[CH2:36][CH2:35]3)=[C:17]([C@H:23]([O:29][C:30]([CH3:33])([CH3:32])[CH3:31])[C:24]([O:26][CH2:27][CH3:28])=[O:25])[C:18]([CH3:22])=[N:19][C:20]=2[CH3:21])=[CH:11][CH:10]=1)C1C=CC=CC=1>CCOC(C)=O.[Pd]>[C:30]([O:29][C@@H:23]([C:17]1[C:18]([CH3:22])=[N:19][C:20]([CH3:21])=[C:15]([C:12]2[CH:11]=[CH:10][C:9]([OH:8])=[CH:14][CH:13]=2)[C:16]=1[N:34]1[CH2:35][CH2:36][C:37]([CH3:40])([CH3:41])[CH2:38][CH2:39]1)[C:24]([O:26][CH2:27][CH3:28])=[O:25])([CH3:31])([CH3:32])[CH3:33]

Participants

4

Reactant 1

HCID 118314202(S)-ethyl 2-(5-(4-(benzyloxy)phenyl)-4-(4,4-dimethylpiperidin-1-yl)-2,6-dimethylpyridin-3-yl)-2-(tert-butoxy)acetate

Product 1

HCID 118314205(S)-ethyl 2-(tert-butoxy)-2-(4-(4,4-dimethylpiperidin-1-yl)-5-(4-hydroxyphenyl)-2,6-dimethylpyridin-3-yl)acetateYield 99%

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 8857Ethyl AcetateSolvent

Procedure

A mixture of (S)-ethyl 2-(5-(4-(benzyloxy)phenyl)-4-(4,4-dimethylpiperidin-1-yl)-2,6-dimethylpyridin-3-yl)-2-(tert-butoxy)acetate (0.434 g, 0.777 mmol) and 10% Pd/C (0.083 g, 0.078 mmol) in EtOAc (25 mL) was evacuated and released to H2 three times and left under balloon H2 atmosphere for h. Then, filtered through a plug of celite and concentrated to afford (S)-ethyl 2-(tert-butoxy)-2-(4-(4,4-dimethylpiperidin-1-yl)-5-(4-hydroxyphenyl)-2,6-dimethylpyridin-3-yl)acetate (0.36 g, 0.768 mmol, 99% yield) as white solid which was used in subsequent reactions without purification. 1H NMR (500 MHz, CDCl3) δ 7.11 (dd, J=2.0, 8.6 Hz, 1H), 6.99-7.03 (m, 1H), 6.94 (tdd, J=2.2, 4.4, 6.4 Hz, 2H), 6.09 (s, 1H), 4.23-4.30 (m, 1H), 4.19 (qd, J=7.1, 10.8 Hz, 1H), 3.18 (d, J=11.4 Hz, 1H), 2.88 (t, J=12.1 Hz, 1H), 2.62 (s, 3H), 2.28 (d, J=10.9 Hz, 1H), 2.22 (s, 3H), 2.10 (t, J=11.7 Hz, 1H), 1.51-1.60 (m, 1H), 1.33-1.42 (m, 1H), 1.27 (t, J=7.1 Hz, 3H), 1.21 (s, 9H), 1.18-1.20 (m, 1H), 1.09 (d, J=9.9 Hz, 1H), 0.91 (br. s., 3H), 0.66 (br. s., 3H). LCMS (M+H)=469.3.

Workup

  1. customwas evacuated
  2. waitleft under balloon H2 atmosphere for h
  3. filtrationThen, filtered through a plug of celite
  4. concentrationconcentrated

Sources & evidence

ORD record
ord-76b623e055c743509ff42fb2beb37a1f
Source dataset
uspto-grants-2015_11
Patent number
US09193720B2

Reaction notes

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