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1 Supporting Information Wiley-VCH Weinheim, Germany Total Synthesis of Spirastrellolide F thyl Ester Part 2: Macrocyclization and Completion of the Synthesis** Stefan Benson, Marie-Pierre Collin, Gregory W. Neil, Julien Ceccon, Bernhard Fasching, Micha l D. B. Fenster, CØdrickx Godbout, Karin Radkowski, Richard Goddard, and Alois Fürstner* anie_ _sm_miscellaneous_information.pdf
2 C46 C42 C45 C76 C74 C80C79 C82 C84 C73 C61 C75 C78 C83 C77 C81 C48 C16 C18 C62 C69 C52 C15 C19 C56 C41 C51 C14 C20 C49 C17 C55 C65 9 C43 Si2 6 7 C70 C44 C50 C53 C47 C21 C57 5 C22 4 C13 Si1 10 C11 C12 C58 C67 C24 8 C23 C54 C71 C8 C9 C6 C10 C33 C5 C7 C60 C25 C34 C32 C4 C26 3 C C31 C30 C3 C27 C39 15 C35 C28 C29 C2 C38 12 C1 13 C63 C64 C66 C68 C C37 C36 Cl1 C59 Figure S-1. Structure of compound 10 2(C 6 H 14 ) in the solid state. Anisotropic displacement parameters are drawn at the 50% probability level, hydrogen atoms are omitted for clarity.
3 2 C44 C47D C47B C46 12 C52A C48C C49A C49C C51C C30 C47A C32 C47C C48B 13 C48A C34 C33 C49B C35 C29 C28 C31 Cl1 11 C27 C26 C51A C52B C50 C51B C2 C36 C45 2 C1 C37 1 C39 14 C38 C40 C42 C25 C22 10 C24 C23 9 C43 C5 C4 C6 C3 C7 3 C C9 C C11 C21 C20 C19 C18 6 C13 C12 7 C17 C14 C16 C41 C15 Figure S-2. Structure of compound (C 7 H 16 ) in the solid state. Anisotropic displacement parameters are drawn at the 50% probability level, hydrogen atoms are omitted for clarity. X-ray crystal structure analysis of 10 2(C 6 H 14 ): [C 60 H 105 Cl 15 Si 2 ] 2 [C 6 H 14 ], M r = g mol -1, colorless needle, crystal size 0.55 x 0.08 x 0.08 mm, orthorhombic, space group P , a = (3) Å, (4) Å, c = (6) Å, V = (3) Å 3, T = 200 K, Z = 4, D calc = g cm 3, λ = Å, μ(cu-k α ) = mm -1, Gaussian absorption correction (T min = 0.73, T max = 0.93), scaling SADABS, Bruker AXS Proteum X8 diffractometer, 2.64 < θ < 67.83, measured reflections, independent reflections, 8054 reflections with I > 2σ(I). Structure solved by direct methods and refined by full-matrix least-squares against F 2 to R 1 = [I > 2σ(I)], wr 2 = 0.267, 815 parameters. The crystal contains two molecules of disordered hexane, which was modelled by 24 C atoms each with half occupancy. H atoms on the disordered hexane molecules were not included in the refinement, otherwise H atoms riding. Solute C atoms were refined using isotropic atomic displacement parameters. The highest residual electron density is close to Si2 indicating that
4 3 the siloxy group may be slightly disordered. The somewhat high R int of is in part due to the high redundancy of the dataset and relatively low I/σ(I) at higher angles. Absolute structure parameter = 0.03(3), S = 1.016, residual electron density / e Å -3. CCDC X-ray crystal structure analysis of (C 7 H 16 ): [C 45 H 75 Cl 15 ] 1.2 [C 7 H 16 ], M r = g mol -1, colorless needle, crystal size x x mm, tetragonal, space group P4 1, a = (2) Å, b = (2) Å, c = (2) Å, V = 5510(1) Å 3, T = 150 K, Z = 4, D calc = g cm 3, synchrotron radiation, λ = 0.8 Å, μ = mm -1, Gaussian absorption correction (T min = 0.99, T max = 1.00), scaling SADABS, Bruker AXS Smart Apex2 diffractometer at the ANKA synchrotron facility Karlsruhe, 2.97 < θ < 28.81, measured reflections, independent reflections, 6629 reflections with I > 2σ(I). Structure solved by isomorphic replacement and refined by full-matrix least-squares against F 2 to R 1 = [I > 2σ(I)], wr 2 = 0.209, 628 parameters. The crystal contains disordered heptane solute. The solute was modelled by 17 carbon atoms each with an occupancy of 0.5 giving a crystal formula of C 45 H 75 Cl (C 7 H 16 ). Hydrogen atoms were not included in the solute. therwise H atoms were calculated and allowed to refine using a riding model. Solute C atoms were refined using isotropic atomic displacement parameters. It cannot be ruled out that the solute region of the crystal contains dichloromethane since another crystal (0.081 x x mm) from the same batch recrystallized from dichloromethane/heptane appeared to contain dichloromethane based on distances between peaks obtained from a Fourier synthesis map calculated with the macrocycle (CCDC ). The relatively high R int of can be attributed to the relatively weak data, the average redundancy of over 8 with which the data were measured and the difficulty of scaling data measured using synchrotron radiation due to the beam decay over the 12 h measurement time. Absolute structure parameter = 0.46(12), S = 1.019, residual electron density / e Å -3. CCDC
5 4 Spectrosocopic Data of Selected Compounds α 20 D seco-acid 8. [ ] = (c = 0.81, CH 2 Cl 2 ); IR (neat): 3463, 2970, 2930, 2855, 1738, Bn 1439, 1365, 1229, 1217, 1092, 980, 921, 835, 774 cm -1 ; 1 H NMR (600 H H 2 C TBS TBS Cl MHz, C 6 D 6 ): see Table S-1; 13 C NMR (150 MHz, C 6 D 6 ): see Table S- 1; HRMS (ESI + ): calcd for C 67 H 113 Cl 16 Si 2 Na [M+Na] + : ; found: [ ] 20 Macrolactone 9. α = +8,1 (c = 0.49, CH 2 Cl 2 ). IR (neat): 2930, 2855, 1737, 1461, 1377, Bn D 1363, 1247, 1215, 1159, 1145, 1088, 1069, 1005, 972, 934, 879, 865, Cl 834, 806, 772, 734, 697 cm -1 ; 1 H NMR (600 MHz, C 6 D 6 ): see Table TBS S-2; 13 C NMR (150 MHz, C 6 D 6 ): see Table S-2; HRMS (ESI + ): calcd TBS for C 67 H 111 Cl 15 Si 2 Na [M+Na] + : ; found: α 20 D Macrolactone 10. [ ] = (c = 0.26, CH 2 Cl 2 ). IR (neat): 3477, 2931, 2856, 1737,1461, H 1377, 1247, 1215, 1158, 1087, 1068, 1004, 975, 933, 878, 834, 807, Cl 772,704 cm -1 ; 1 H NMR (600 MHz, C 6 D 6 ): see Table S-3; 13 C NMR TBS (150 MHz, C 6 D 6 ): see Table S-3; HRMS (ESI + ): calcd for TBS C 60 H 105 Cl 15 Si 2 Na [M+Na] + : ; found: [ ] 20 Macrolactone 11. α = (c = 0.41, CH 2 Cl 2 ). IR (neat): 2931, 2857, 1738, 1461, Bn D 1436, 1377, 1362, 1249, 1216, 1193, 1082, 1049, 1030, 1005, 982, Cl 932, 878, 834, 806, 773,735, 697 cm -1 ; 1 H NMR (600 MHz, C 6 D 6 ): see TBS Table S-4; 13 C NMR (150 MHz, C 6 D 6 ): see Table S-4; HRMS (ESI + ): TBS calcd for C 67 H 113 Cl 15 Si 2 Na [M+Na] + : ; found: Spirastrellolide F thyl Ester (2). 1 H NMR (600 MHz, C 6 D 6 ): see Table S-5; 13 C NMR (150 MHz, C 6 D 6 ): see Table S-6; HRMS (ESI + ): calcd for C 53 H 85 Cl 17 Na [M+Na] + : ; found:
6 5 Table S-1. 1 H NMR and 13 C NMR Data of seco-acid 8 in C 6 D 6. H-Atom 1 H NMR (600 MHz) a C-Atom 13 C NMR (150 MHz) b a 2.54 dd (14.7, 9.1) b 2.28 dd (14.7, 3.9) a b a b a b br dd (11.0, 8.7) a b a b a b a b a b a b a b ddd (11.2, 9.5, 4.8) br d (9.5) dd (6.7, 0.7) br d (6.5) a 2.67 ddd (14.4, 11.9, 3.9) b 2.58 ddd(14.4, 11.9, 4.9) 26a b t (9.8) ddd (10.8, 9.5, 4.9) a 2.16 dd (12.5, 4.8) b 1.46 dd (12.3, 10.8) a b a
7 6 33b a 2.39 dd (14.7, 6.5) b 2.71 d (14.6) a b a 3.39 ddd (9.3, 4.4, 3.3) b 3.19 ddd (10.9, 9.3, 2.0) d (6.3) s a 5.64 s b 5.24 s s d (7.0) (acetonide) 1.70 s (acetonide) 27.0 (acetonide) 1.42 s (acetonide) (CH 3 ) 2 C tbu 1.08 s tbu 26.4 tbu 1.07 s tbu 26.3 Si 0.29 s Si -2.6 Si 0.25 s Si -3.4 Si 0.26 s Si -3.7 Si 0.32 s Si (CH 3 ) 3 CSi (CH 3 ) 3 CSi i-ph o-ph 7.15 o-ph m-ph 7.12 t m-ph p-ph 7.05 t p-ph PhCH a 4.15 d (11.6) PhCH PhCH b 4.10 d (11.7) a δ H (ppm), multiplicity, coupling constant J (Hz); b δ C (ppm).
8 7 Table S-2. 1 H NMR and 13 C NMR data of Macrolactone 9 in C 6 D 6 H-Atom 1 H NMR (600 MHz) a C-Atom 13 C NMR (150 MHz) b a 2.49 dd (15.8, 10.6) b tt (10.7, 2.0) a b a b a b br t (9.5) a 2.01 br t (11.8) b br t (10.3) a b a b a b a b a b ddd (10.8, 9.4, 4.5) d (9.4) d (6.7) br d (6.5) a b a b dt (10.4, 3.2) t (10.1) a b a b a b 1.36
9 a 2.24 dd (15.4, 6.7) b 1.95 d (15.3) dd (6.6, 3.1) td (6.3, 3.1) q (6.3) a 3.71 dt (9.3, 6.3) b 3.65 dt (9.3, 6.3) d (6.2) s a 5.75 s b 5.07 s s d (6.7) (acetonide) 1.49 s (acetonide) 26.9 (acetonide) 1.75 s (acetonide) (CH 3 ) 2 C tbu 1.07 s tbu 26.6 tbu 1.00 s tbu 26.0 Si 0.35 s Si -2.3 Si 0.15 s Si -3.4 Si 0.33 s Si -3.8 Si 0.21 s Si (CH 3 ) 3 CSi (CH 3 ) 3 CSi i-ph o-ph 7.37 d o-ph m-ph 7.23 t m-ph p-ph 7.08 t p-ph PhCH a 4.38 d (11.9) PhCH PhCH b 4.34 d (11.4) a δ H (ppm), multiplicity, coupling constant J (Hz); b δ C (ppm).
10 9 Table S-3. 1 H NMR and 13 C NMR data of Macrolactone 10 in C 6 D 6 H-Atom 1 H NMR (600 MHz) a C-Atom 13 C NMR (150 MHz) b a 2.43 dd (15.2, 10.3) b 2.14 dd (15.2, 2.4) a b a b a b a b a b ddd (10.5, 5.7, 2.5) a b a b a b a b d (6.5) br d (6.5) a b a b br dd (10.2, 7.1) t (10.0) ddd (11.2, 9.6, 4.8) a 2.13 dd (12.6, 4.9) b 1.30 dd (12.6, 11.4) a b a b 1.30
11 a 2.24 dd (14.5, 6.8) b 1.98 dd (14.5, 3.1) s a 5.78 s b 5.18 s s (acetonide) 1.45 s (acetonide) 26.8 (acetonide) 1.73 s (acetonide) (CH 3 ) 2 C tbu 1.09 s tbu 26.6 tbu 1.04 s tbu 26.2 Si 0.33 s Si -2.2 Si 0.37 s Si -3.4 Si 0.22 s Si -3.6 Si 0.20 s Si (CH3) 3 CSi (CH3) 3 CSi 18.3 H a δ H (ppm), multiplicity, coupling constant J (Hz); b δ C (ppm).
12 11 Table S-4. 1 H NMR and 13 C NMR Data of Macrolactone 11 in C 6 D 6 H-Atom 1 H NMR (600 MHz) a C-Atom 13 C NMR (150 MHz) b a 2.46 dd (15.0, 9.5) b 2.18 dd (15.0, 2.4) a b a b a b br t (9.5) a b a b dt (10.3, 3.5) a b a b a b a b td (9.7, 4.3) d (9.3) d (6.0) dd (10.5, 5.9) a b a b ddd (10.1, 4.8, 2.8) t (9.85) ddd (10.9, 9.5, 4.7) a 2.12 dd (12.7, 4.7) b 1.31 dd (12.5, 11.0) a b a b 1.27
13 a 2.23 dd (15.3, 6.3) b 1.91 d (15.3) dd (6.3, 2.7) br dd (10.1, 6.2) a b a 3.71 td (9.9, 3.3) b 3.60 dt (9.7, 4.7) d (6.3) s d (6.5) s d (6.7) (acetonide) 1.68 s (acetonide) 26.9 (acetonide) 1.49 s (acetonide) (CH 3 ) 2 C tbu 1.05 s tbu 26.5 tbu 1.03 s tbu 26.1 Si 0.35 s Si -2.8 Si 0.15 s Si -3.5 Si 0.31 s Si -4.1 Si 0.20 s Si (CH 3 ) 3 CSi (CH 3 ) 3 CSi i-ph o-ph 7.36 d o-ph m-ph 7.23 t m-ph p-ph 7.08 t p-ph PhCH a 4.37 d (12.1) PhCH PhCH b 4.27 d (12.1) a δ H (ppm), multiplicity, coupling constant J (Hz); b δ C (ppm). 12
14 13 Table S-5. 1 H NMR data of natural and synthetic Spirastrellolide F thyl Ester (2) in C 6 D 6 ; arbitrary numbering scheme as shown in the Insert. H-Atom 1 H NMR (500 MHz) a H NMR (600 MHz) b literature data synthetic sample Δδ 2a 2.47 dd (16.9, 9.5) 2.55 dd (17.1, 9.5) b d (16.9) a b a b a b a b br t (8.7) 4.60 t (9.0) a b t (10.9) a b a b a ddd (13.5, 3.8, 3.2) b a b d (9.2) t (10.3) 0.01
15 a b a b br t (9.6) 3.98 ddd (10.0, 9.0, 1.5) t (9.6) 3.62 t (9.9) td (9.6, 4.8) 3.84 ddd (11.3, 9.6, 5.0) a dd (12.7, 5.0) b dd (12.8, 11.4) a dt (13.3, 3.1) b a b a 2.29 dd (15.5, 7.0) 2.28 dd (15.7, 7.1) b 1.98 d (15.5) 1.97 d (15.5) dd (6.9, 3.5) a b br dt (15.2, 7.2) dt (15.4, 6.8) 5.87 dt (15.3, 6.4) a 2.75 dt (15.1, 6.8) 2.74 dt (15.4, 6.9) b 2.65 dt (15.1, 6.8) 2.64 dt (15.4, 7.3) br dt (10.8, 7.7) br dt (10.7, 7.6) a dddd (14.4, 8.0, 4.7, 1.3) b dddd (14.5, 7.2, 5.8, 1.2) d (6.5) 0.83 d (6.6) s (s br) c 0.06/ d (6.9) 1.32 d (7.0) s 3.35 s d (6.6) 1.08 d (6.7) s 3.32 s 0.00 H H c H d (8.0) 4.20 c H c H c a J. rg. Chem. 2007, 72, ; b δ H (ppm), multiplicity, coupling constant J (Hz); c the signal shows a time-dependent behavior, cf. Text.
16 15 Table S C NMR data of Synthetic and Natural Spirastrellolide F thyl Ester (2) in C 6 D 6 ; c arbitrary numbering scheme as shown in the insert to the previous Table. C-Atom 13 C NMR (100 MHz) a 13 C NMR (150 MHz) b Δδ literature data synthetic sample br br br br br br br br br br br
17 a J. rg. Chem. 2007, 72, ; b δ C (ppm); c signals featuring a significant linebroadening are marked br
18 2 C H Cl H H H H 2 1 H NMR 600 MHz, C D ) ppm
19 18 2 C H Cl H H H H 2 13 CNMR(150MHz,C 6 D 6 ) ppm
20 NESY spectrum of spirastrellolide F methyl ester (2) after 93h in C 6 D 6 2 C 46 H Cl H H H H 2 19
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