Benzyl Alcohol → HCID 53676667, compound

HRID 342109Notes

Reaction equation

HRID 342109 reaction equation
[CH2:1]([O:4][C:5](=[O:30])[CH2:6][CH2:7][CH:8]([NH:12][C:13]([O:15][CH2:16][CH:17]1[C:29]2[CH:28]=[CH:27][CH:26]=[CH:25][C:24]=2[C:23]2[C:18]1=[CH:19][CH:20]=[CH:21][CH:22]=2)=[O:14])[C:9]([OH:11])=[O:10])[CH:2]=[CH2:3].[CH2:31](O)[C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1.CCN=C=NCCCN(C)C.CN(C1C=CC=CN=1)C>C(Cl)Cl>[CH2:31]([O:10][C:9](=[O:11])[CH:8]([NH:12][C:13]([O:15][CH2:16][CH:17]1[C:18]2[CH:19]=[CH:20][CH:21]=[CH:22][C:23]=2[C:24]2[C:29]1=[CH:28][CH:27]=[CH:26][CH:25]=2)=[O:14])[CH2:7][CH2:6][C:5]([O:4][CH2:1][CH:2]=[CH2:3])=[O:30])[C:32]1[CH:37]=[CH:36][CH:35]=[CH:34][CH:33]=1

Participants

6

Reactant 4

HCID 244Benzyl AlcoholHCID 159081-Ethyl-3-(3'-dimethylaminopropyl)carbodiimideHCID 218852-DimethylaminopyridineHCID 3971270Fmoc-DL-Glu(OAll)-OH

Product 1

HCID 53676667HCID 53676667, compoundYield 82%

Reagents, catalysts & solvents 1

HCID 6344DichloromethaneSolvent2×

Conditions

Temperature
22 °C

Procedure

Treatment with Fmoc-Cl followed by coupling to benzyl alcohol using 1-ethyl-3-[3-(dimethylamino)propyl]-carbodiimide [by] hydrochloride (EDCl) provided 2-(9H-Fluoren-9-ylmethoxycarbonylamino)-pentanedioic acid 5-allyl ester 1-benzyl ester 6 in 82% yield. To a solution of 1.5 g (36.6 mmol) of 5 in 5 mL of CH2Cl2 was added 0.42 mL (40.3 mmol) of benzyl alcohol, 0.912 g (47.6 mmol) of EDCI, and 45 mg (3.66 mmol) of dimethylaminopyridine (DMAP). The reaction mixture was stirred at 22° C. for 6 h, diluted with 20 mL of CH2Cl2, and extracted with H2O (1×5 mL), 0.1M HCl (2×15 mL), and brine (2×10 mL). The organic layer was dried (Na2SO4), concentrated in vacuo, and chromatographed on SiO2 (Hexanes/EtOAc, 5:1) to give 1.83 g (82%) of 6 as a white solid: Mp 66.2°-67.1° C. (EtOAc/Hexanes); [α]D +1.4° (c 1.64, CHCl3, 21° C.); IR (neat) 3314, 1726, 1682, 1527, 1443, 1414, 1383, 1254, 1173, 1099, 1082, 980, 754, 735 cm-1 ; 1H NMR δ 7.75 (d, 2 H, J=7.4 Hz), 7.59 (d, 2 H, J=7.1 Hz), 7.41-7.27 (m, 9 H), 5.95-5.85 (m, 1 H), 5.44 (d, 1 H, J=8.2 Hz), 5.34-5.19 (m, 4 H), 4.56 (d, 2 H, J=5.6 Hz), 4.5-4.4 (m, 3 H), 4.21 (t, 1 H, J=7.0 Hz), 2.5-2.0 (m, 4 H); 13C NMR δ 172.2, 171.6, 155.8, 143.7, 143.5, 141.1, 135.0, 131.8, 128.5, 128.3, 128.1, 127.6, 126.9, 124.9, 119.8, 118.3, 67.2, 66.9, 66.2, 53.3, 47.0, 28.0, 27.3; MS (FAB, MNBA/MeOH) m/z (relative intensity) 500 ([M+H]+, 40), 465 (8), 448 (14), 433 (12), 413 (8), 386 (38), 371 (24), 349 (9), 324 (16), 309 (26), 293 (11), 265 (10), 247 (24), 231 (56), 215 (39), 202 (26), 191 (24), 179 (67), 165 (48), 154 (67), 143 (31), 133 (71), 117 (100).

Workup

  1. extractionextracted with H2O (1×5 mL), 0.1M HCl (2×15 mL), and brine (2×10 mL)
  2. dry with materialThe organic layer was dried (Na2SO4)
  3. concentrationconcentrated in vacuo
  4. customchromatographed on SiO2 (Hexanes/EtOAc, 5:1)

Sources & evidence

ORD record
ord-03a698aae0244f718e74eab194ad1031
Source dataset
uspto-grants-1999_01
Patent number
US05856506

Reaction notes

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