Ethyl 1-[(R)-1-Phenylethyl]hexahydropyrrolo[3,4-b]pyrrole-5(1H)-carboxylate → Ethyl hexahydropyrrolo[3,4-B]pyrrole-5(1H)-carboxylate

HRID 12943Notes

Reaction equation

C1([C@H]([N:9]2[CH:13]3[CH2:14][N:15]([C:17]([O:19][CH2:20][CH3:21])=[O:18])[CH2:16][CH:12]3[CH2:11][CH2:10]2)C)C=CC=CC=1>CO.[OH-].[OH-].[Pd+2]>[NH:9]1[CH2:10][CH2:11][CH:12]2[CH2:16][N:15]([C:17]([O:19][CH2:20][CH3:21])=[O:18])[CH2:14][CH:13]12

Participants

Conditions

Temperature: 50 °C

Procedure

5% Palladium hydroxide on activated carbon (13.9 g, 50% w/w in water) was added to a pressure reactor. The product of Example A3 (as 506.8 g of a 25.9 wt % solution of ethyl 1-((R)-1-phenylethyl)hexahydropyrrolo[2,3-c]pyrrole-5(1H)-carboxylate (131.3 g) in MeOH) was added, followed by a methanol rinse (37 g). The mixture was heated to 50° C. under an atmosphere of hydrogen (40 psi) for 4 hours. The mixture was filtered through Hyflo® Filter Aid and rinsed with 200 mL of MeOH to provide a solution containing 78.9 g of the title compound.

Workup

washrinse (37 g)
filtrationThe mixture was filtered through Hyflo®
filtrationFilter Aid
washrinsed with 200 mL of MeOH
customto provide a solution

Sources & evidence

ORD record: ord-1ffd651d5e484a56ba3b0fcbeba5233b
Source dataset: uspto-grants-2010_06
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US07728031B2

Reaction notes

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