تفاعل #83086
ord-9cf9b2e152cf4134b30a35eb7c1e4df0
معادلة التفاعل
الكواشف
لا شيء
ظروف التفاعل
الظروف التفصيلية
See reaction.notes.procedure_details.
المعالجة
- 1درجة الحرارةThe temperature is maintained below -10° C. during the addition
- 2ترشيحThe reaction is filtered
- 3تركيزthe filtrate concentrated in vacuo to an oily residue
- 4أخرىThe residue is purified by chromatography (silica gel: 50% ethyl acetate/hexane)
الإجراء التجريبي
To a -20° C. solution, under argon, of 8.4 ml of trifluoromethanesulfonic anhydride in 75 ml of methylene chloride is added, dropwise, a solution of 5.9 g of product from Example 268 and 4.05 ml of pyridine in 25 ml of methylene chloride. The temperature is maintained below -10° C. during the addition. The progress of the reaction is monitored by tic. The reaction is filtered and the filtrate concentrated in vacuo to an oily residue, The residue is purified by chromatography (silica gel: 50% ethyl acetate/hexane) to give 7.03 g of the desired product.