Реакция #47142

Уравнение реакции

triflate

1,1′-[[(Propane-1,3-diyl)dioxy]bis[(11S,11aS)-10-(2,2,2-trichloroethoxycarbonyl)-11-(tert-butyldimethylsilyloxy)-7-methoxy-2-[[(trifluoromethyl)sulfonyl]oxy]-1,10,11,11a-tetrahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-one]]

LiCl

tributyl(phenylethynyl)tin

→

17

Выход 92.7%

1,1′-[[(Propane-1,3-diyl)dioxy]bis[(11S,11aS)-10-(2,2,2-trichloroethoxycarbonyl)-11-(tert-butyldimethylsilyloxy)-7-methoxy-2-ethynylphenyl-1,10,11,11a-tetrahydro-5H-pyrrolo[2,1-c][1,4]benzodiazepin-5-one]]

Выход 92.7%

Растворители

THF

Условия реакции

Обработка

1. 1
   ТемператураThe reaction mixture was heated
2. 2
   Температураat reflux for 2.5 h when TLC
3. 3
   Другоеthe complete consumption of the starting material
4. 4
   Другоеexcess solvent was removed
5. 5
   workup.DISSOLUTIONthe residue was dissolved in DCM (20 mL)
6. 6
   Промывкаby washing with 10% NH4OH (20 mL)
7. 7
   ЭкстракцияThe aqueous layer was extracted with DCM (3×20 mL)
8. 8
   Промывкаwashed with brine (50 mL)
9. 9
   Сушкаdried (MgSO4)
10. 10
    ФильтрацияFiltration and evaporation of solvent
11. 11
    Другоеafforded the crude product which
12. 12
    Другоеwas purified by flash column chromatography (80:20 v/v hexane/EtOAc)

Методика

A catalytic amount of Pd(PPh3)4 was added to a stirred mixture of triflate 13 (193 mg, 0.13 mmol), LiCl (34 mg, 0.80 mmol, 6.0 eq) and tributyl(phenylethynyl)tin (0.14 mL, 157 mg, 0.40 mmol, 3.0 eq) in dry THF (5 mL). The reaction mixture was heated at reflux for 2.5 h when TLC showed the complete consumption of the starting material. After cooling to room temperature, excess solvent was removed and the residue was dissolved in DCM (20 mL), followed by washing with 10% NH4OH (20 mL). The aqueous layer was extracted with DCM (3×20 mL), and the organic extracts were combined, washed with brine (50 mL) and dried (MgSO4). Filtration and evaporation of solvent afforded the crude product which was purified by flash column chromatography (80:20 v/v hexane/EtOAc) to afford 17 as a yellow glass (162 mg, 90%): 1H NMR (400 MHz, CDCl3) δ 7.40-7.37 (m, 4H, H15), 7.26-7.19 (m, 10H, H3, H6, H16 and H17), 6.70 (s, 2H, H9), 5.85 (d, 2H, J=8.8 Hz, H11), 5.15 (d, 2H, J=12.0 Hz, Troc CH2), 4.24-4.19 (m, 2H, OCH2CH2CH2O), 4.12-4.02 (m, 4H, Troc CH2 and OCH2CH2CH2O), 3.86-3.79 (m, 8H, OCH3×2 and H11a), 3.15 (dd, 2H, J=10.8, 16.5 Hz, H1), 2.63 (d, 2H, J=16.5 Hz, H1), 2.37-2.35 (m, 2H, OCH2CH2CH2O), 0.82 (s, 18H, TBS CH3×6), 0.22 and 0.18 (s×2, 12H, TBS CH3×4); 13C NMR (100.6 MHz, CDCl3) δ 163.8 (Cquat), 153.6 (Cquat), 150.8 (Cquat), 149.3 (Cquat), 133.3 (C3), 131.4 (C15), 128.4 (C16 and C17), 127.8 (Cquat), 125.1 (Cquat), 123.0 (Cquat), 114.0 (C6), 110.0 (C9), 104.8 (Cquat), 95.2 (Troc CCl3), 93.7 (Calkyne), 86.9 (C11), 83.6 (Calkyne), 74.8 (Troc CH2), 66.0 (OCH2CH2CH2O), 61.4 (C11a), 56.2 (OCH3), 37.8 (C1), 28.8 (OCH2CH2CH2O), 25.6 (TBS CH3), 17.8 (TBS Cquat); MS (ES), m/z (relative intensity) 1344 (M+., 8), 625 (100).

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