反应 #452458

ord-569ed572bb68436eaab4e845b5eb49b9

反应条件

详细条件
See reaction.notes.procedure_details.

后处理

  1. 1
    其他the solution was evaporated
  2. 2
    其他to give a paste
  3. 3
    workup.STIRRINGstirring
  4. 4
    其他to afford
  5. 5
    workup.WAITafter standing 20 hr at 0° C.
  6. 6
    过滤filtration
  7. 7
    其他drying in vacuo

实验过程

A solution of 7.52 g (26.6 mmol) of the product from step C in 50 ml of CH2Cl2 and 80 ml of anhydrous pyridine was treated with 11.12 g of (methoxycarbonylsulfamoyl)-triethylammonium hydroxide inner salt (Burgess reagent) in 1-g portions over 5 min. After stirring for 1.5 hr, TLC (90-10-1, CHCl3 -CH3OH-H2O) showed complete conversion to product, and the solution was evaporated to give a paste, to which H2O was added, up to 400 ml, with trituration and stirring to afford, after standing 20 hr at 0° C., filtration and drying in vacuo, the title compound as a white solid.

来源

DOI: 10.6084/m9.figshare.5104873.v1专利: US06127333uspto-grants-2000_10