反応 #2304284

反応方程式

19a

methyl (3aR,5S,6R,6aS)-6-hydroxy-2,2-dimethyl-5-{[(N-{[4,7,10-tris(2-tert-butoxy-2-oxoethyl)-1,4,7,10-tetraazacyclododecan-1-yl]acetyl}glycyl)amino]methyl}dihydrofuro[2,3-d][1,3]dioxole-3a(5H) -carboxylate

→

Product 20a

収率 81.0%

(3aR,5S,6R,6aS)-6-hydroxy-2,2-dimethyl-5-{[(N-{[4,7,10-tris(2-tert-butoxy-2-oxoethyl)-1,4,7,10-tetraazacyclododecan-1-yl]acetyl}glycyl)amino]methyl}dihydrofuro[2,3-d][1,3]dioxole-3a(5H)-carboxylic acid

収率 81.0%

溶媒

MeOH

反応条件

後処理

1. 1
   その他Solvents were evaporated
2. 2
   その他the residue was purified by silica column chromatography

実験手順

To a solution of 19a (1.0 g, 1.17 mmol) in MeOH (2 mL) was added a solution of LiOHH2O (48.5 mg, 1.17 mmol, Aldrich). The resulting solution was stirred at room temperature for 4 h. Solvents were evaporated and the residue was purified by silica column chromatography. Product 20a was obtained as a white solid (0.8 g; yield 81%).

出典