2-trimethylsilylacetic acid

Conditions: temp:0.00; pressure:0.00; stir:; See reaction.notes.procedure_details.

Procedure: Trimethylsilylacetic acid (0.1 mmole) and N-hydroxyphthalimide (0.1 mmole) were weighed under N2 and placed in a conical flask with 2 side arms (flask A). Dry THF/dioxane (0.5 mL) was added and removed carefully under vacuum to dry the substrates. THF (0.4 mL) was added and mixed to dissolve the substrates. DCC (95 μL, 1 M solution in methylene chloride) dried on activated molecular sieves was added and mixed. The reaction was stirred 3 hours, and a precipitate formed after 10 minutes. THF was removed under vacuum to dryness. Dry ether was added (1 mL) and mixed to dissolve the product of coupling, the reaction was left for 5 minutes for the by-product dicyclohexylurea to settle. The upper layer was transferred and filtered into the second flask. Dry ether (0.5 mL) was added, mixed and the upper layer was again transferred as above. The ether was removed under vacuum to leave the TMS-acetoxyphthalimide as a white solid. placed in a conical flask with 2 side arms removed carefully under vacuum to dry the substrates THF (0.4 mL) was added mixed to dissolve the substrates DCC (95 μL, 1 M solution in methylene chloride) dried on activated molecular sieves was added mixed a precipitate formed after 10 minutes THF was removed under vacuum to dryness Dry ether was added (1 mL) mixed to dissolve the product of coupling the reaction was left for 5 minutes for the by-product dicyclohexylurea filtered into the second flask Dry ether (0.5 mL) was added mixed The ether was removed under vacuum