Methanol → HCID 86615660, compound

HRID 507096Notes

Reaction equation

HRID 507096 reaction equation
[C:1]([O:5][C:6]([N:8]1[C:21]2[C:13](=[CH:14][C:15]3[CH2:16][O:17][CH2:18][C:19]=3[CH:20]=2)[C@@H:12]([N:22]([CH2:28][C:29]2[CH:34]=[C:33]([C:35]([F:38])([F:37])[F:36])[CH:32]=[C:31]([C:39]([F:42])([F:41])[F:40])[CH:30]=2)[C:23]2[N:24]=[N:25][NH:26][N:27]=2)[CH2:11][CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:3])[CH3:2].CO.[C:45]1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1.N(C(OCC)=O)=NC(OCC)=O>ClCCl>[C:1]([O:5][C:6]([N:8]1[C:21]2[C:13](=[CH:14][C:15]3[CH2:16][O:17][CH2:18][C:19]=3[CH:20]=2)[C@@H:12]([N:22]([CH2:28][C:29]2[CH:30]=[C:31]([C:39]([F:40])([F:41])[F:42])[CH:32]=[C:33]([C:35]([F:36])([F:37])[F:38])[CH:34]=2)[C:23]2[N:24]=[N:25][N:26]([CH3:45])[N:27]=2)[CH2:11][CH2:10][CH2:9]1)=[O:7])([CH3:4])([CH3:2])[CH3:3]

Participants

6

Reactant 4

HCID 887MethanolHCID 11776TriphenylphosphineHCID 220568ethyl N-ethoxycarbonyliminocarbamateHCID 59432391HCID 59432391, compound

Product 1

HCID 86615660HCID 86615660, compound

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent

Procedure

To a solution of (S)-9-[(3,5-bis-trifluoromethyl-benzyl)-(2H-tetrazol-5-yl)-amino]-1,3,6,7,8,9-hexahydro-2-oxa-5-aza-cyclohepta[f]indene-5-carboxylic acid tert-butyl ester (1.17 mmol) in dichloromethane (20 mL), add methanol (5.85 mmol) and triphenylphosphine (3.51 mmol). To this solution, add diethyl azodicarboxylate (3.51 mmol) dropwise at room temperature. After stirring for 12 h, remove the solvent under vacuum and chromatograph the intermediate over silica gel eluting with ethyl acetate/hexane (2-35%) to afford (S)-9-[(3,5-bis-trifluoromethyl-benzyl)-(2-methyl-2H-tetrazol-5-yl)-amino]-1,3,6,7,8,9-hexahydro-2-oxa-5-aza-cyclohepta[f]indene-5-carboxylic acid tert-butyl ester as a colorless oil. To this intermediate in dichloromethane (5 mL), add TFA (2 mL). After stirring for 2 h, quench the reaction with aqueous sodium carbonate (5 mL) and dilute with dichloromethane (10 mL). Separate the organic portion, dry over sodium sulfate, filter, and remove the solvent under vacuum. This provides the title compound as a crude oil that is further used without purification.

Workup

  1. customremove the solvent under vacuum and chromatograph the intermediate over silica gel eluting with ethyl acetate/hexane (2-35%)

Sources & evidence

ORD record
ord-6966e4cced534e97aa77fac89de06534
Source dataset
uspto-grants-2010_08
Patent number
US07786108B2

Reaction notes

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