Reaktion #58546

Reaktionsgleichung

NaOH

AlCl3

tert-butylaminoborane

HCl

product

6-Benzyl-3b,4,5,6,7,7a-hexahydro-1-thia-6-aza-cyclopenta[α]inden-8-one

AlCl3 borane

→

subtitle compound

Ausbeute 73.0%

6-Benzyl-4,5,6,7,7a, 8-hexahydro-3bH-1-thia-6-aza-cyclopenta[α]indene

Ausbeute 73.0%

Lösungsmittel

CH2Cl2

CH2Cl2

Reaktionsbedingungen

Aufarbeitung

1. 1
   workup.WAITAfter 2 hours at 0° C.
2. 2
   Sonstigethe crude reaction mixture
3. 3
   Extraktionextracted with CH2Cl2 (3×75 ml)
4. 4
   WaschenThe combined organic extracts were washed with brine (75 ml)
5. 5
   Trocknendried (MgSO4)
6. 6
   SonstigeThe solvent was evaporated in vacuo
7. 7
   Sonstigethe crude product was purified by silica-gel chromatography

Vorschrift

A slurry of AlCl3 (571 mg, 4.29 mmol) in CH2Cl2 (4 ml) was treated with tert-butylaminoborane (746 mg, 8.58 mmol) at 0° C. and stirred for 30 minutes. Next, a solution of the product from step f) (406 mg, 1.43 mmol) in CH2Cl2 (3 ml) was added dropwise to the AlCl3/borane solution. After 2 hours at 0° C., the crude reaction mixture was poured into cold 10% HCl, treated with 2 M NaOH to pH 12 and extracted with CH2Cl2 (3×75 ml). The combined organic extracts were washed with brine (75 ml) and dried (MgSO4). The solvent was evaporated in vacuo and the crude product was purified by silica-gel chromatography using a ethyl acetate/hexanes gradient (0% to 75% ethyl acetate) to give 279 mg (73%) of the subtitle compound. MS calculated for C17H19NS+H 270, observed 270.

Quelle