Triphenylphosphine → Benzyl 4-[4-(2-tert-butoxycarbonylaminoethoxy)phenyl]-3-[4-(3-methoxypropyl)-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethoxy]piperidine-1-carboxylate

HRID 1176500Notes

Reaction equation

HRID 1176500 reaction equation
[OH:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[CH2:13][CH2:12][N:11]([C:14]([O:16][CH2:17][C:18]3[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=3)=[O:15])[CH2:10][CH:9]2[O:24][CH2:25][C:26]2[CH:27]=[CH:28][C:29]3[O:34][CH2:33][C:32](=[O:35])[N:31]([CH2:36][CH2:37][CH2:38][O:39][CH3:40])[C:30]=3[CH:41]=2)=[CH:4][CH:3]=1.O[CH2:43][CH2:44][NH:45][C:46](=[O:52])[O:47][C:48]([CH3:51])([CH3:50])[CH3:49].C1(P(C2C=CC=CC=2)C2C=CC=CC=2)C=CC=CC=1>O1CCCC1>[C:48]([O:47][C:46]([NH:45][CH2:44][CH2:43][O:1][C:2]1[CH:7]=[CH:6][C:5]([CH:8]2[CH2:13][CH2:12][N:11]([C:14]([O:16][CH2:17][C:18]3[CH:19]=[CH:20][CH:21]=[CH:22][CH:23]=3)=[O:15])[CH2:10][CH:9]2[O:24][CH2:25][C:26]2[CH:27]=[CH:28][C:29]3[O:34][CH2:33][C:32](=[O:35])[N:31]([CH2:36][CH2:37][CH2:38][O:39][CH3:40])[C:30]=3[CH:41]=2)=[CH:4][CH:3]=1)=[O:52])([CH3:51])([CH3:50])[CH3:49]

Participants

5

Reactant 3

HCID 11776TriphenylphosphineHCID 2733206tert-butyl N-(2-hydroxyethyl)carbamateHCID 68500605HCID 68500605, compound

Product 1

HCID 68504530Benzyl 4-[4-(2-tert-butoxycarbonylaminoethoxy)phenyl]-3-[4-(3-methoxypropyl)-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethoxy]piperidine-1-carboxylate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

A solution of 1.197 g of benzyl 4-(4-hydroxyphenyl)-3-[4-(3-methoxypropyl)-3-oxo-3,4-dihydro-2H-benzo[1,4]oxazin-6-ylmethoxy]piperidine-1-carboxylate (Example 166c), 0.506 ml of tert-butyl (2-hydroxyethyl)carbamate and 0.848 g of triphenylphosphine in 10 ml of tetrahydrofuran at 0° C. is admixed dropwise with 0.66 ml of diisopropyl azodicarbonate. The reaction mixture is warmed to room temperature, stirred further for 22 hours and subsequently concentrated by evaporation. The title compound is obtained as a yellow oil from the residue by means of flash chromatography (SiO2 60F). Rf=0.50 (2:1 EtOAc-heptane); Rt=5.39.

Workup

  1. customat 0° C.
  2. concentrationsubsequently concentrated by evaporation

Sources & evidence

ORD record
ord-dc57466d47254787bac219511db11de5
Source dataset
uspto-grants-2010_11
Patent number
US07842688B2

Reaction notes

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