Iodoacetamide → HCID 19968500, compound

To a solution of 1.25 g (7.8 mmole) of N-(t-butoxycarbonyl)ethylenediamine in 10 mL of acetonitrile was added 1.36 mL (7.8 mole) of DIEA followed by 1.44 g (7.8 mmole) of iodoacetamide at room temperature. After 90 min most of the solvent was removed in vacuo and the residue was taken up in 12 mL of CH2Cl2 and was treated with 1.36 mL (7.8 mmole) of DIEA and then 1.1 mL (7.8 mmole) of benzyl chloroformate. The resulting solution was stirred at room temperature for 2 days, and was then concentrated partly in vacuo. The residue was treated with 100 mL of ethyl acetate and 20 mL of 1M aqueous tartaric acid and the layers were separated. The organic layer was washed with 2×15 mL of water, the tartaric acid layer was extracted with 30 mL of ethyl acetate, this extract was washed with 2×10 mL of water, and the combined organic layers were dried over sodium sulfate, filtered and concentrated in vacuo. The residue was purified by flash chromatography on 131 g of silica gel eluting with 2.5 L of 100:4 CH2Cl2 :methanol to provide 1.5 g (55%) of an oil.

1. customAfter 90 min most of the solvent was removed in vacuo
2. concentrationwas then concentrated partly in vacuo
3. additionThe residue was treated with 100 mL of ethyl acetate and 20 mL of 1M aqueous tartaric acid
4. customthe layers were separated
5. washThe organic layer was washed with 2×15 mL of water
6. extractionthe tartaric acid layer was extracted with 30 mL of ethyl acetate
7. washthis extract was washed with 2×10 mL of water
8. dry with materialthe combined organic layers were dried over sodium sulfate
9. filtrationfiltered
10. concentrationconcentrated in vacuo
11. customThe residue was purified by flash chromatography on 131 g of silica gel eluting with 2.5 L of 100:4 CH2Cl2

ORD record

ord-fdcce805bfd843f0aafeb075bbc3f92c

Source dataset

uspto-grants-1994_09

DOI

10.6084/m9.figshare.5104873.v1

Patent number

US05344830