反应详情

11.1 g (27.9 mmol) of benzyl 6-acetoxy-4-bromomethyl-2-formylamino-hex-3-enoate and 30.5 ml (111.5 mmol) of 90% triisopropyl phosphite are heated to 80° C. and the mixture is stirred for 18 hours under a pressure of 100-150 mbar. Excess triisopropyl phosphite is removed by distillation and the residue is purified by chromatography over silica gel with ethyl acetate/isopropanol (7:1), giving benzyl 6-acetoxy-2-formylamino-4-diisopropylphosphonomethyl-hex-3-enoate as an orange oil.

1. customExcess triisopropyl phosphite is removed by distillation
2. customthe residue is purified by chromatography over silica gel with ethyl acetate/isopropanol (7:1)