Methyl propiolate → (E)-methyl 3-((3S,6S,7R,8S)-8-benzyl-3-(tert-butoxycarbonylamino)-6-methyl-4-oxo-1,5-dioxonan-7-yloxy)acrylate

HRID 75744

반응식

HRID 75744 반응식
[CH2:1]([C@@H:8]1[C@@H:16]([OH:17])[C@H:15]([CH3:18])[O:14][C:13](=[O:19])[C@@H:12]([NH:20][C:21](=[O:27])[O:22][C:23]([CH3:26])([CH3:25])[CH3:24])[CH2:11][O:10][CH2:9]1)[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.[C:28]([O:32][CH3:33])(=[O:31])[C:29]#[CH:30]>C(Cl)Cl.C1N2CCN(CC2)C1>[CH2:1]([C@H:8]1[CH2:9][O:10][CH2:11][C@H:12]([NH:20][C:21]([O:22][C:23]([CH3:26])([CH3:25])[CH3:24])=[O:27])[C:13](=[O:19])[O:14][C@@H:15]([CH3:18])[C@@H:16]1[O:17]/[CH:30]=[CH:29]/[C:28]([O:32][CH3:33])=[O:31])[C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1

참가 물질

5

반응물 2

HCID 13536Methyl propiolateHCID 86701245tert-butyl ((3S,7S,8R,9S)-7-benzyl-8-hydroxy-9-methyl-2-oxo-1,5-dioxonan-3-yl)carbamate

생성물 1

HCID 86701238(E)-methyl 3-((3S,6S,7R,8S)-8-benzyl-3-(tert-butoxycarbonylamino)-6-methyl-4-oxo-1,5-dioxonan-7-yloxy)acrylate수율 91.2%

시약·촉매·용매 2

HCID 9237Dabco촉매HCID 6344Dichloromethane용매

실험 절차

To a solution of tert-butyl ((3S,7S,8R,9S)-7-benzyl-8-hydroxy-9-methyl-2-oxo−1,5-dioxonan-3-yl)carbamate (280 mg, 0.738 mmol, 1.00 equiv) in CH2Cl2 (7.4 mL) were added methyl propiolate (0.098 mL, 1.11 mmol, 1.50 equiv) and DABCO (4 mg, 0.04 mmol, 0.05 equiv). This solution was stirred at room temperature for 1 h, concentrated, and purified by automated silica gel column chromatography (5-25% acetone in hexanes) to provide (E)-methyl 3-(((3S,6S,7R,8S)-8-benzyl-3-((tert-butoxycarbonyl)amino)-6-methyl-4-oxo-1,5-dioxonan-7-yl)oxy)acrylate (312 mg, 91%) as a white solid: mp slow melt from 50-80° C., recrystallized at 98° C., remelt at 128-129° C.; IR (neat film) 3342, 2980, 2949, 1753, 1703, 1639, 1497, 1329, 1132, 910, 731 cm−1; 1H NMR (400 MHz, CDCl3) δ 7.48 (d, J=12.2 Hz, 1H), 7.32-7.27 (m, 2H), 7.23-7.18 (m, 1H), 7.15-7.11 (m, 2H), 5.40 (d, J=12.2 Hz, 1H), 5.10 (d, J=8.3 Hz, 1H), 5.02 (dd, J=9.3, 6.4 Hz, 1H), 4.64 (dd, J=15.3, 7.5 Hz, 1H), 3.92 (dd, J=11.6, 7.6 Hz, 1H), 3.74 (d, J=9.1 Hz, 1H), 3.71 (s, 3H), 3.51 (d, J=11.1 Hz, 1H), 3.43 (dd, J=10.5, 6.4 Hz, 1H), 3.29 (dd, J=11.3, 7.5 Hz, 1H), 2.92 (dd, J=13.8, 3.5 Hz, 1H), 2.34 (t, J=12.5 Hz, 1H), 2.06 (s, 1H), 1.42 (s, 9H), 1.41 (d, J=6.5 Hz, 3H); 13C NMR (100 MHz, CDCl3) δ 172.16, 167.97, 162.94, 154.91, 138.54, 129.09, 128.57, 126.48, 98.50, 89.01, 80.31, 73.94, 72.57, 71.33, 52.70, 51.26, 46.47, 35.18, 28.25, 18.73; HRMS-ESI (m/z) [M+Na]+ calc'd for C24H33NO8Na, 486.2098. found, 486.2104.

후처리

  1. concentrationconcentrated
  2. custompurified by automated silica gel column chromatography (5-25% acetone in hexanes)

출처 및 근거

ORD 기록
ord-e266892eddf2426eacbd461f541d60db
출처 데이터셋
uspto-grants-2014_09
특허 번호
US08835462B2

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