Reaktion #419311

Reaktionsgleichung

sodium hydroxide

formaldehyde

1-(4-methylnaphthalen-1-yl)-3-azabicyclo[3.1.0]hexane

sodium triacetoxyborohydride

→

1-(4-methylnaphthalen-1-yl)-3-methyl-3-azabicyclo[3.1.0]hexane

Lösungsmittel

Reaktionsbedingungen

Aufarbeitung

1. 1
   SonstigeThe organic layer was separated
2. 2
   Extraktionthe aqueous solution was extracted with methylene chloride
3. 3
   workup.ADDITIONcontaining 2-propanol (2×10 mL)
4. 4
   TrocknenThe combined organic solution was dried (MgSO4)
5. 5
   Einengenconcentrated in vacuo

Vorschrift

A stirred solution/suspension of 1-(4-methylnaphthalen-1-yl)-3-azabicyclo[3.1.0]hexane (85 mg, 0.38 mmol) in 1,2-dichloromethane (12 mL) was treated with 37% aqueous formaldehyde (0.23 mL, 3.0 mmol), then with sodium triacetoxyborohydride (318 mg, 1.5 mmol), stirred for 3 h, then treated with 1N sodium hydroxide (5 mL). The organic layer was separated and the aqueous solution was extracted with methylene chloride containing 2-propanol (2×10 mL). The combined organic solution was dried (MgSO4) and concentrated in vacuo to afford 1-(4-methylnaphthalen-1-yl)-3-methyl-3-azabicyclo[3.1.0]hexane (76 mg, 84%, essentially pure without chromatography). This was dissolved in anhydrous ether (5 mL) and treated with 2N HCl/ether (0.35 mL, 0.7 mmol), stirred a few minutes, filtered, rinsed with ether, collected, and dried in vacuo to afford 1-(4-methylnaphthalen-1-yl)-3-methyl-3-azabicyclo[3.1.0]hexane, hydrochloride (72 mg, 82%) as a white solid. MS (M+1) 238.1. 1H NMR (CDCl3) δ □ 12.70 (br s, 1H), 8.16 (m, 1H), 8.04 (m, 1H), 7.58 (m, 2H), 7.37 (m, 1H), 7.26 (m, 1H), 4.20 (m, 1H), 4.06 (m, 1H), 3.50 (m, 1H), 3.14 (m, 1H), 2.90 (d, 3H, J=5 Hz), 2.68 (s, 3H), 2.40 (m, 1H), 2.13 (m, 1H), 1.22 (m, 1H). 13C NMR (CDCl3) δ 135.73, 133.21, 131.70, 126.81, 126.35, 126.33, 125.41, 124.54, 61.65, 57.62, 41.52, 30.97, 22.37, 19.75.

Quelle