Supporting Information. Synthesis and biological evaluation of nojirimycin- and
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- Σωστράτη Μαγγίνας
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1 Supporting Information for Synthesis and biological evaluation of nojirimycin- and pyrrolidine-based trehalase inhibitors Davide Bini 1, Francesca Cardona 2, Matilde Forcella 1, Camilla Parmeggiani 2,3, Paolo Parenti 4, Francesco Nicotra 1, Laura Cipolla* 1 Address: 1 Department of Biotechnology and Biosciences, University of Milano-Bicocca, Piazza della Scienza 2, Milano, Italy, 2 Department of Chemistry Ugo Schiff, University of Florence, Polo Scientifico e Tecnologico, Via della Lastruccia 3 13, Sesto Fiorentino, Florence, Italy, 3 Present address: CNR-INO U. O. S. Sesto Fiorentino c/o LENS, Via Nello Carrara 1, Sesto Fiorentino, Florence, Italy and 4 Department of Environmental Sciences, University of Milano-Bicocca, Piazza della Scienza 1, Milano, Italy. Laura Cipolla - laura.cipolla@unimib.it * Corresponding author Full experimental data S1
2 (2R,3R,4R,5S,6R)-N-benzyl-3,4,5-tris(benzyloxy)-2-((benzyloxy)methyl)-6- propylpiperidine-1-carboxamide (23): Flash column chromatography (petroleum ether/etoac, 87.5:12.5). 1 H NMR (400 MHz, CDCl 3 ) δ (m, 25H, ArH), 6.75 (bs, 1H, NH), (m, 10H, CH 2 Ph), (m, 7H, H-2, H-3, H-4, H-5, H-6, H-1 ), (m, 4H, CH 2 CH 2 CH 3 ), 0.90 (t, J = 7.3 Hz, 3H, CH 2 CH 2 CH 3 ) ppm; Anal. calcd for C 45 H 50 N 2 O 5 : C, 77.33; H, 7.21; N, 4.01; found: C, 77.30; H, 7.19; N, (2R,3R,4R,5S,6R)-N-benzyl-3,4,5-trihydroxy-2-(hydroxymethyl)-6-propylpiperidine-1- carboxamide (10): 1 H NMR (400 MHz, D 2 O) δ (m, 5H, ArH), (m, 2H, H-1 ), 4.44 (d, J = 15.2 Hz, 1H, CH 2 Ph), 4.33 (d, J = 15.1 Hz, 1H, CH 2 Ph), (m, 1H, H-2), (m, 1H, H-6), (m, 3H, H-3, H-4, H-5), (m, 1H, CH 2 CH 2 CH 3 ), (m, 1H, CH 2 CH 2 CH 3 ), (m, 1H, CH 2 CH 2 CH 3 ), (m, 1H, CH 2 CH 2 CH 3 ), (m, 3H, CH 2 CH 2 CH 3 ) ppm; Anal. calcd for C 17 H 26 N 2 O 5 : C, 60.34; H, 7.74; N, 8.28; found: C, 60.31; H, 7.76; N, (2R,3R,4R,5S,6R)-2-(hydroxymethyl)-6-propylpiperidine-3,4,5-triol (13): 1 H NMR (400 MHz, D 2 O) δ (m, 1H, H-4), (m, 5H, H-3, H-5, H-6, H-1 ), (m, 1H, H-2), (m, 2H, CH 2 CH 2 CH 3 ), (m, 2H, CH 2 CH 2 CH 3 ), 0.77 (t, J = 7.3 Hz, 3H, CH 2 CH 2 CH 3 ) ppm; 13 C NMR ( MHz, D 2 O) δ (d, C-5), (d, C- 4), (d, C-3), (t, C-1 ), (d, C-2), 55.21(d, C-6), (t, CH 2 CH 2 CH 3 ), (t, CH 2 CH 2 CH 3 ), (q, CH 2 CH 2 CH 3 ) ppm; MS (TOF) m/z: [M + H] + ; found 206.3; Anal. calcd for C 9 H 19 NO 4 : C, 52.66; H, 9.33; N, 6.82; found: C, 52.68; H, 9.31; N, (2R,3R,4R,5S)-N-benzyl-3,4,5-tris(benzyloxy)-2-((benzyloxy)methyl)piperidine-1- carboxamide (25): Flash column chromatography (petroleum ether/etoac 75:25). 1 H NMR (400 MHz, CDCl 3 ) δ (m, 25H, ArH), 5.85 (bs, 1H,NH), 4.73 (dd, J = 11.6, 8.1 Hz, 2H, CH 2 Ph), 4.63 (s, 2H, CH 2 Ph), 4.52 (dd, J = 21.0, 11.6 Hz, 2H, CH 2 Ph), 4.40 (d, J = 2.7 Hz, 2H, CH 2 Ph), 4.32 (d, J = 3.5 Hz, 2H, NHCH 2 Ph), (m, 1H, H- S2
3 2), 3.96 (dd, J = 14.1, 4.4 Hz, 1H, Ha-6), (m, 1H, H-4), 3.70 (dd, J = 8.8, 4.4 Hz, 1H, H-3), 3.63 (dd, J = 9.6, 3.5 Hz, 1H, Ha-1 ), (m, 2H, H-5, Hb-1 ), 3.32 (dd, J = 14.1, 3.7 Hz, 1H, Hb-6) ppm; 13 C NMR ( MHz, CDCl 3 ) δ (s, C=O), , , , , (s, CAr), (d, CHAr), (d, C-4), (d, C-3), (d, C-5), 73.60, (t, CH 2 Ph), (t, C-1 ), (d, C-2), (t, NHCH 2 Ph), (t, C-6) ppm; Anal. calcd for C 42 H 44 N 2 O 5 : C, 76.80; H, 6.75; N, 4.26; found: C, 76.78; H, 6.71; N, (2R,3R,4R,5S)-3,4,5-trihydroxy-2-(hydroxymethyl)piperidine-1-carboxamide (12): 1 H NMR (400 MHz, D 2 O) δ (m, 1H, H-2), (m, 4H, H-5, Ha-6, H-1 ), (m, 1H, H-3), (m, 1H, H-4), 3.22 (dd, J = 14.9, 3.2 Hz, 1H, Hb-6) ppm; 13 C NMR ( MHz, D 2 O) δ (s, C=O), (d, C-4), (d, C-5), (d, C-3), (d, C-2), (t, C-1 ), (t, C-6) ppm; MS (TOF) m/z: [M + H] + ; found (2R,3R,4R,5R)-2-(hydroxymethyl)-5-propylpyrrolidine-3,4-diol (14): 1 H NMR (400 MHz, D 2 O) δ 3.89 (dd, J = 13.7, 6.5 Hz, 1H, H-3), (m, 3H, H-4, H-1 ), 3.39 (bs, 1H, H- 2), 3.26 (dd, J = 14.1, 8.0 Hz, 1H, H-5), 1.70 (dt, J = 15.1, 6.4 Hz, 1H, CH 2 CH 2 CH 3 ), 1.57 (dt, J = 14.2, 8.7 Hz, 1H, CH 2 CH 2 CH 3 ), 1.28 (dt, J = 14.7, 7.5 Hz, 2H, CH 2 CH 2 CH 3 ), 0.78 (t, J = 7.1 Hz, 3H, CH 2 CH 2 CH 3 ) ppm; 13 C NMR ( MHz, D 2 O) δ (d, C-4), (d, C-3), (d, C-2), (d, C-5), (t, C-1 ), (t, CH 2 CH 2 CH 3 ), (t, CH 2 CH 2 CH 3 ), (q, CH 2 CH 2 CH 3 ) ppm; MS (TOF) m/z: [M + H] + ; found 176.2; Anal. calcd for C 8 H 17 NO 3 : C, 54.83; H, 9.78; N, 7.99; found: C, 54.80; H, 10.00; N, (2R,3R,4S,5S)-2-(hydroxymethyl)-5-propylpyrrolidine-3,4-diol (17): 1 H NMR (400 MHz, D 2 O) δ 4.10 (t, J = 5.4 Hz, 1H, H-3), 3.97 (t, J = 5.8 Hz, 1H, H-4), 3.82 (dd, J = 12.6, 3.8 Hz, 1H, Ha-1 ), 3.73 (dd, J = 12.6, 6.0 Hz, 1H, Hb-1 ), 3.55 (dd, J = 9.4, 4.6 Hz, 1H, H-2), 3.45 (dd, J = 14.1, 7.2 Hz, 1H, H-5), (m, 2H, CH 2 CH 2 CH 3 ), (m, 2H, CH 2 CH 2 CH 3 ), 0.85 (t, J = 7.3 Hz, 3H, CH 2 CH 2 CH 3 ) ppm; 13 C NMR ( MHz, D 2 O) δ S3
4 74.26 (d, C-4), (d, C-3), (d, C-2), (d, C-5), (t, C-1 ), (t, CH 2 CH 2 CH 3 ), (t, CH 2 CH 2 CH 3 ), (q, CH 2 CH 2 CH 3 ) ppm; MS (TOF) m/z: [M + H] + ; found 176.2; Anal. calcd for C 8 H 17 NO 3 : C, 54.83; H, 9.78; N, 7.99; found: C, 54.85; H, 9.75; N, (2R,3R,4R,5R)-N-benzyl-3,4-bis(benzyloxy)-2-((benzyloxy)methyl)-5- propylpyrrolidine-1-carboxamide (28): Flash column chromatography (petroleum ether/etoac 75:25). 1 H NMR (400 MHz, CDCl 3 ) δ (m, 20H, ArH), 5.50 (bs, 1H, NH), (m, 8H, CH 2 Ph), (m, 1H, H-2), 3.99 (m, 1H, H-4), 3.91 (m, 1H, H-5), (m, 2H, H-3, Ha-1 ), (m, 1H, Hb-1 ), 2.03 (m, 1H, CH 2 CH 2 CH 3 ), 1.61 (m, 1H, CH 2 CH 2 CH 3 ), (m, 2H, CH 2 CH 2 CH 3 ), 0.91 (t, J = 7.3 Hz, 3H, CH 2 CH 2 CH 3 ) ppm; 13 C NMR ( MHz, CDCl 3 ) δ (s, C=O), (s, C Ar), (d, CH Ar), (d, C-4), (d, C-3), (t, CH 2 Ph, C- 1 ), (d, C-5), (d, C-2), (t, NHCH 2 Ph), (t, CH 2 CH 2 CH 3 ), (t, CH 2 CH 2 CH 3 ), (q, CH 2 CH 2 CH 3 ) ppm; MS (TOF) m/z: [M + H] + ; found 579.6; Anal. calcd for C 37 H 42 N 2 O 4 : C, 76.79; H, 7.31; N, 4.84; found: C, 76.81; H, 7.28; N, (2R,3R,4S,5S)-N-benzyl-3,4-bis(benzyloxy)-2-((benzyloxy)methyl)-5- propylpyrrolidine-1-carboxamide (29): Flash column chromatography (petroleum ether/etoac 25:75). 1 H NMR (400 MHz, CDCl 3 ) δ (m, 20H, ArH), 6.73 (bs, 1H, NH), (m, 9H, H-1, CH 2 Ph), 4.05 (m, 1H, H-2), (m, 3H, H-4, H-3, Ha- 1 ), 3.40 (t, J = 9.0 Hz, 1H, Hb-1 ), (m, 1H, CH 2 CH 2 CH 3 ), (m, 1H, CH 2 CH 2 CH 3 ), (m, 2H, CH 2 CH 2 CH 3 ), 0.90 (t, J = 7.2 Hz, 3H, CH 2 CH 2 CH 3 ) ppm; 13 C NMR ( MHz, CDCl 3 ) δ (s, C=O), , , , (s, C Ar), (d, CH Ar), (d, C-4), (d, C-3), 75.53, 74.21, 72.60, (t, C-1, CH 2 Ph), (d, C-5, C-2), (t, NHCH 2 Ph), (t, CH 2 CH 2 CH 3 ), (t, CH 2 CH 2 CH 3 ), (q, CH 2 CH 2 CH 3 ) ppm; MS (TOF) m/z: [M + H] + ; found 579.6; Anal. calcd for C 37 H 42 N 2 O 4 : C, 76.79; H, 7.31; N, 4.84; found: C, 76.77; H, 7.33; N, S4
5 (2R,3R,4R,5R)-3,4-dihydroxy-2-(hydroxymethyl)-5-propylpyrrolidine-1-carboxamide (16): 1 H NMR (400 MHz, D 2 O) δ 3.95 (d, J = 12.8 Hz, 1H, H-3), 3.87 (d, J = 11.7 Hz, 1H, H-4), (m, 3H, H-2, H-1 ), (m, 1H, H-5), (m, 1H, CH 2 CH 2 CH 3 ), (m, 1H, CH 2 CH 2 CH 3 ), (m, 2H, CH 2 CH 2 CH 3 ), (m, 3H, CH 2 CH 2 CH 3 ) ppm; 13 C NMR ( MHz, D 2 O) δ (s, C=O), 77.74, (d, C-3, C-4), (d, C-2), (d, C-5), (t, C-1 ), (t, CH 2 CH 2 CH 3 ), (t, CH 2 CH 2 CH 3 ), (q, CH 2 CH 2 CH 3 ) ppm; MS (TOF) m/z: [M + H] + ; found (2R,3R,4S,5S)-3,4-dihydroxy-2-(hydroxymethyl)-5-propylpyrrolidine-1-carboxamide (19): 1 H NMR (400 MHz, acetone) δ (m, 1H, Ha-1 ), 3.91 (bs, 1H, Hb-1 ), 3.84 (d, J = 9.4 Hz, 1H, H-4), (m, 1H, H-5), 3.70 (t, J = 6.0 Hz, 1H, H-2), (m, 1H, H-3), (m, 4H, CH 2 CH 2 CH 3 ), 0.91 (t, J = 7.0 Hz, 3H, CH 2 CH 2 CH 3 ) ppm; 13 C NMR ( MHz, D 2 O) δ (s, C=O), 73.38, (d, C-3, C-4), 63.97, (d, C-2, C-5), (t, C-1 ), (t, CH 2 CH 2 CH 3 ), (t, CH 2 CH 2 CH 3 ), (t, CH 2 CH 2 CH 3 ) ppm; MS (TOF) m/z: [M + H] + ; found (2R,3R,4R)-1-octyl-2-(hydroxymethyl)pyrrolidin-3,4-diol (20): To a solution of nitrone 30 (188 mg, 0.45 mmol) in MeOH (8 ml), Pd/C (420 mg) and concentrated HCl (four drops) were added. The mixture was stirred under H 2 atmosphere at rt for 15 h, then filtered through Celite and concentrated under reduced pressure to obtain the corresponding trihydroxy pyrrolidine chloridate (75 mg, 0.44 mmol) in 98% yield. This was dissolved in MeOH (3 ml), and then acetic acid (0.02 ml), Na(CN)BH 3 (28 mg, 0.44 mmol) and octanal (83 µl, 0.53 mmol) were added. The reaction mixture was stirred at rt for 8 h, then the solvent was removed under reduced pressure. The crude was passed through an ion-exchange resin Dowex WX8-200 and eluted with MeOH, water and a 6% solution of NH 4 OH. Subsequent purification on silica gel (eluent: CH 2 Cl 2 /MeOH/NH 4 OH 33% 10:1:0.1, R f 0.1 ) gave pure 20 (37 mg, 0.15 mmol), in 33% yield as yellow pale oil. 1 H NMR (400 MHz, CD 3 OD) δ (m, 1H, H-4), (m, 1H, H-3), 3.68 (m, 2H, S5
6 H-1 ), 3.07 (d, J = 10.2 Hz, 1H, Ha-5), 2.88 (m, 1H, NCH 2 ), 2.73 (dd, J = 10.2, 4.4 Hz, 1H, Hb-5), 2.52 (bs, 1H, H-2), (m, 1H, NCH 2 ), (m, 2H), (m, 10H), 0.89 (t, J = 6.8 Hz, 3H, Me) ppm; 13 C NMR (50.29 MHz, CD 3 OD) δ 78.1 (d, C-3), 74.8 (d, C-4), 72.7 (d, C-2), 60.1 (t, C-1 ), 58.3 (t, C-5), 54.8 (t, NCH 2 ), 30.7, 28.3, 28.1, 26.5, 26.2, 21.4 (t, CH 2 ), 12.1 (q, CH 3 ) ppm; ESIMS m/z: ([M + H] +, 100); Anal. calcd for C 13 H 27 NO 3 : C, 63.64; H, 11.09; N, 5.71; found: C, 63.78; H, 11.15; N, (2R,3R,4R,5R)-3,4-bis(benzyloxy)-2-[(benzyloxy) methyl]-5-octylpyrrolidin-1-ol (31): To a solution of nitrone 30 (510 mg, 1.22 mmol) in dry THF (16 ml), a 2 M solution of octylmagnesium bromide in Et 2 O (2.14 mmol) at 75 C was added. After 3 h the temperature was raised to rt and the mixture controlled by TLC (eluent: petroleum ether/etoac 1:1) showing the disappearance of the starting material and the formation of a new product. The mixture was treated with a saturated aqueous solution of NaHCO 3 (12 ml) at 0 C and extracted with Et 2 O. The crude, obtained after evaporation of the solvent under reduced pressure, was purified by FCC (eluent: petroleum ether/etoac 5:1, R f 0.2) to obtain pure 31 (540 mg, 1.02 mmol) in 84% yield as a white solid. 1 H NMR (400 MHz, CDCl 3 ) δ (m, 15H, Ar), (m, 6H, Bn), 3.93 (dd, J = 3.9, 2.9 Hz, 1H, H-3), 3.79 (dd, J = 5.1, 2.9 Hz, 1H, H-4), (m, 1H, Ha-1 ), (m, 1H, Hb-1 ), 3.52 (dd, J = 10.5, 5.1 Hz, 1H, H-2), (m, 1H, H-5), (m, 1H, CHCH 2 ), (m, 1H), (m, 1H, CHCH 2 ), (m, 11H), 0.87 (t, J = 6.8 Hz, 3H, Me) ppm; 13 C NMR (50.29 MHz, CDCl 3 ) δ (s, 3C, Ar), (d, 15C, Ar), 86.8 (d, C-4), 84.6 (d, C-3), 73.4 (t, Bn), 71.7 (t, 2C, Bn), 70.1 (d, C-5), 70.0 (d, C-2), 68.3 (t, C-1 ), 32.1 (t), (t, 4C), 26.8 (t), 22.9 (t), 14.4 (q, CH 3 ) ppm; ESIMS m/z: ([M + H] +, 32), ([M + Na] +, 100); Anal. calcd for C 34 H 45 NO 4 : C, 76.80; H, 8.53; N, 2.63; found: C, 76.53; H, 8.42; N, (2R,3R,4R,5R)-2-(hydroxymethyl)-5-octylpyrrolidin-3,4-diol (21): To a solution of hydroxypyrrolidine 31 (287 mg, 0.54 mmol) in MeOH (25 ml), Pd/C (150 mg) and HCl S6
7 37% (two drops) were added, and the mixture was stirred under H 2 atmosphere at rt overnight and then filtered through Celite and concentrated under reduced pressure. The obtained crude was passed through an ion-exchange resin Dowex WX8-200 eluting with MeOH, water and a 6% solution of NH 4 OH, to obtain pure 21 (96 mg, 0.39 mmol) in 73% yield as a yellow solid, mp 113 C (dec.). 1 H NMR (400 MHz, CD 3 OD) δ 3.76 (t, J = 6.4 Hz, 1H, H-3), 3.67 (dd, J = 11.2, 3.9 Hz, 1H, Ha-1 ), (m, 2H, Hb-1, H-4), 3.01 (dt, J = 6.3, 4.4 Hz, 1H, H-2), 3.89 (dt, J = 7.3, 5.4 Hz, 1H, H-5), (m, 1H, CH 2 ), (m, 1H, CH 2 ), (m, 12H, CH 2 ), 0.89 (t, J = 6.8 Hz, 3H, Me) ppm; 13 C NMR (50.29 MHz, CD 3 OD) δ 81.9 (d, C-4), 77.9 (d, C-3), 63.2 (d, C-2), 61.6 (t + d, 2C, C-5, C- 1 ), 33.7, 31.8, 29.6, 29.4, 26.5, 22.5 (t, 6C), 13.3 (q, CH 3 ) ppm; ESIMS m/z: ([M + H] +, 87), ([M + Na] +, 100); Anal. calcd for C 13 H 27 NO 3 : C, 63.64; H, 11.09; N, 5.71; found: C, 63.69; H, 10.86; N, S7
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