تفاعل #7998

معادلة التفاعل

2-(2-methoxy-5-methyl-6-oxo-6,7,8,9-tetrahydro-8aH-fluoren-8a-yl)ethyl methanesulfonate

sodium iodide

→

9a-(2-iodoethyl)-7-methoxy-4-methyl-1,2,9,9a-tetrahydro-3H-fluoren-3-one

المردود 64.0%

المذيبات

acetone

acetone

ظروف التفاعل

المعالجة

1. 1
   درجة الحرارةAfter cooling
2. 2
   ترشيحfiltered through a 0.45 Fm Acrodisc
3. 3
   ترشيحfilter
4. 4
   أخرىThe filtrate was evaporated under vacuum
5. 5
   ترشيحthe residue in CH2Cl2 (3 mL) was re-filtered
6. 6
   أخرىThe filtrate was purified by chromatography on a Biotage Flash 12M KP-Sil column (12 mm×15 cm) which
7. 7
   غسيلwas eluted with 4:1 hexanes-EtOAc
8. 8
   أخرىcollecting 6 mL fractions every 30 seconds

الإجراء التجريبي

A solution of 2-(2-methoxy-5-methyl-6-oxo-6,7,8,9-tetrahydro-8aH-fluoren-8a-yl)ethyl methanesulfonate (49.7 mg, 0.142 mmol) in acetone (2.0 mL) was treated with sodium iodide (85 mg, 0.57 mmol) and the resulting mixture was stirred and heated in an oil bath at 60° C. for 16 hours. After cooling, the mixture was diluted with acetone (2 mL) and filtered through a 0.45 Fm Acrodisc filter. The filtrate was evaporated under vacuum and the residue in CH2Cl2 (3 mL) was re-filtered. The filtrate was purified by chromatography on a Biotage Flash 12M KP-Sil column (12 mm×15 cm) which was eluted with 4:1 hexanes-EtOAc, collecting 6 mL fractions every 30 seconds. Fractions 9-11 gave 9a-(2-iodoethyl)-7-methoxy-4-methyl-1,2,9,9a-tetrahydro-3H-fluoren-3-one (34.5 mg, 64% yield) as an oil.

المصدر