反応 #63720

反応方程式

N-Cbz-β-benzyl-L-aspartyl-D-serine 2,2,5-trimethylcyclopentyl ester

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final product

L-Aspartyl-D-serine-(2,2,5-trimethylcyclopentyl)ester

溶媒

CH3OH

反応条件

後処理

1. 1
   その他Upon completion of the reaction
2. 2
   ろ過the mixture is filtered through Celite
3. 3
   濃縮concentrated to dryness

実験手順

To a magnetically stirred solution of 0.1 mole 2,2,5-trimethylcyclopentyl-D-serinate in 100 ml dry DMF at 0° C. under an argon atmosphere is added 1 equivalent of N-Cbz-L-aspartic acid β-benzyl ester followed by addition of 1 equivalent each of Cu(II) chloride and dicyclohexylcarbodiimide. After 18 hours the mixture is poured into 200 ml 0.1N HCl and extracted with 300 ml ethyl acetate which is successively washed with saturated NaHCO3, H2O, and dried over MgSO4. Filtration and evaporation yields N-Cbz-β-benzyl-L-aspartyl-D-serine 2,2,5-trimethylcyclopentyl ester. 2 g N-Cbz-β-benzyl-L-aspartyl-D-serine 2,2,5-trimethylcyclopentyl ester in 50 ml dry CH3OH is hydrogenated in a Paar apparatus over 5% Pd/C. Upon completion of the reaction, the mixture is filtered through Celite and concentrated to dryness to yield the final product.

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