Estrone → 3-Nicotinoyloxyestra-1,3,5(10)-trien-17-one

HRID 1085178Notes

Reaction equation

HRID 1085178 reaction equation
Cl.[C:2](Cl)(=[O:9])[C:3]1[CH:8]=[CH:7][CH:6]=[N:5][CH:4]=1.[CH3:11][C@@:12]12[C:28](=[O:29])[CH2:27][CH2:26][C@H:25]1[C@H:24]1[C@@H:15]([C:16]3[CH:17]=[CH:18][C:19]([OH:30])=[CH:20][C:21]=3[CH2:22][CH2:23]1)[CH2:14][CH2:13]2>N1C=CC=CC=1>[C:2]([O:30][C:19]1[CH:18]=[CH:17][C:16]2[C@@H:15]3[C@H:24]([C@H:25]4[C@@:12]([CH2:13][CH2:14]3)([CH3:11])[C:28](=[O:29])[CH2:27][CH2:26]4)[CH2:23][CH2:22][C:21]=2[CH:20]=1)(=[O:9])[C:3]1[CH:8]=[CH:7][CH:6]=[N:5][CH:4]=1

Participants

4

Reactant 2

HCID 5870EstroneHCID 884383-Pyridinecarbonyl chloride, hydrochloride (1:1)

Product 1

HCID 137310683-Nicotinoyloxyestra-1,3,5(10)-trien-17-one

Reagents, catalysts & solvents 1

HCID 1049PyridineSolvent

Procedure

To nicotinoyl chloride hydrochloride (2.65 g, 0.015 mol) in pyridine (20 ml) at 0° C. was added estrone (2 g, 0.0074 mol). The mixture was refluxed for one hour and then poured over 100 ml of ice cold water, filtered, and dried over P2O5 under vacuum. Yield 72% (2.0076 g), m.p. 207°-210° C. NMR (CDCl3) δ 9.3-9.1 (br s, 1H, C2 pyridinium proton), 8.8-8.6 (br d, 1H, C6 pyridinium proton, 8.4-8.2 (br d, 1H, C4 pyridinium proton), 7.5-7.1 (m, 2-H,C5 pyridinium proton+C1 estrone proton), 7.0-6.7 (m, 2H, C2,4 estrone protons), 3.2-1.3 (estrone skeletal protons, 15), 1.0-0.9 (s, 3H, C18 estrone protons). IR (KBr) 1750-1730 cm-1 (broad C=O stretching). Anal. calculated for C24H25NO3 ; C, 76.76; H, 6.72; N, 3.73. Found: C, 76.37; H, 6.96; N, 3.67. The product is further characterized by the structural formula: ##STR1486##

Workup

  1. temperatureThe mixture was refluxed for one hour
  2. filtrationfiltered
  3. dry with materialdried over P2O5 under vacuum

Sources & evidence

ORD record
ord-f894333e698144cba7ec48fab92e3b45
Source dataset
uspto-grants-1991_04
Patent number
US05008257

Reaction notes

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