تفاعل #432242

معادلة التفاعل

sodium hydride

diethyl hydroxymethylphosphonate

Allyl bromide

→

diethyl allyloxymethylphosphonate

المردود 69.0%

المذيبات

diethyl ether

ظروف التفاعل

المعالجة

1. 1
   غسيلTo a hexane washed
2. 2
   workup.STIRRINGthe reaction mixture stirred for 2 hours at 20° C
3. 3
   ترشيحThe solids were filtered off
4. 4
   workup.ADDITIONthe filtrate diluted with dichloromethane (30 ml)
5. 5
   غسيلThe solution was washed with water (2×30 ml)
6. 6
   تجفيفdried (MgSO4)
7. 7
   أخرىthe solvent evaporated

الإجراء التجريبي

To a hexane washed suspension of 60% sodium hydride (262mg, 6.5 mmol) in diethyl ether (10 ml) was added diethyl hydroxymethylphosphonate (lg, 5.95 mmol) and the reaction mixture stirred for 1 hour at 20° C. under nitrogen. Allyl bromide (0.94 g, 0.67 ml, 7.7 mmol) was then added dropwise and the reaction mixture stirred for 2 hours at 20° C. The solids were filtered off and the filtrate diluted with dichloromethane (30 ml). The solution was washed with water (2×30 ml), dried (MgSO4) and the solvent evaporated to give diethyl allyloxymethylphosphonate (0.85 g, 69%) as a clear liquid needing no further purification. νmax (film) 1260, 1030 and 960 cm-1 ; δH (CDCl3) 1.34(6H, t, J7.3 Hz, 2×CH3), 3.71(2H, d, J8.3 Hz, CH2P), 4.17(6H, m, 2×CH2CH3 +CH2OCH2P), 5.28(2H, m, CH2 =CH), 5.88(1H, m, CH2 =CH).

المصدر