2(R)-[(3,4-methylenedioxybenzyl)-(4-methoxy-2,3,6-trimethylbenzenesulfonyl)amino]-3-methylbutyric acid benzyl ester → 2(R)-[(3,4-methylenedioxybenzyl)-(4-methoxy-2,3,6-trimethyl-benzenesulfonyl)amino]-3-methylbutyric acid

Participants

Reaction Steps

To a solution of 2(R)-[(3,4-methylenedioxybenzyl)-(4-methoxy-2,3,6-trimethylbenzenesulfonyl)amino]-3-methylbutyric acid benzyl ester (4.7 g, 8.49 mmol) in a 4:1 mixture of ethanol/tetrahydrofuran (40 mL) was added 10% Pd/C (0.15 g). The reaction mixture was placed under a hydrogen balloon. After 3 h, the reaction mixture was filtered through Celite and the Celite cake was washed with ethanol. The filtrate was concentrated to give of 2(R)-[(3,4-methylenedioxybenzyl)-(4-methoxy-2,3,6-trimethylbenzenesulfonyl)amino]-3-methylbutyric acid (3.9 g) as a white foam.

Provenance & Evidence