تفاعل #2146751
ord-1c1c51f280a14699bc26e6b978be0d32
معادلة التفاعل
(2R,4R,5R)-2,4-dibenzoyloxy-5-benzoyloxymethyl-dihydrofuran-3-one
ethynylmagnesium bromide
→
(2R,3R,4R,5R)-2,4-dibenzoyloxy-5-benzoyloxymethyl-3-ethynyl-tetrahydrofuran-3-ol
الكواشف
لا شيء
المذيبات
ظروف التفاعل
الظروف التفصيلية
See reaction.notes.procedure_details.
المعالجة
- 1أخرىis −30° C.
الإجراء التجريبي
Alternatively, the same procedure as that described in step 2 can be used, except that the reaction temperature is −30° C. and the reaction time is 3 hours, using (2R,4R,5R)-2,4-dibenzoyloxy-5-benzoyloxymethyl-dihydrofuran-3-one (1.0 g, 2.17 mmol, 1.0 equiv.), 1M ethynylmagnesium bromide (13 ml, 6.51 mmol, 3 equiv.) CeCl3 (1.77 g, 7.16 mmol, 3.3 equiv.) and THF (18 ml), to give (2R,3R,4R,5R)-2,4-dibenzoyloxy-5-benzoyloxymethyl-3-ethynyl-tetrahydrofuran-3-ol.