Ipertrofan Revisited—The Proposal of the Complete Stereochemistry of Mepartricin A and B
Abstract
:1. Introduction
2. Results
2.1. A Brief Introduction to the Procedure
2.2. Assignment of the Stereochemistry of Mepartricin A and B
3. Discussion
4. Materials and Methods
4.1. NMR Spectroscopy
4.2. Molecular Modeling Studies
4.3. Haasnoot–de Leeuw–Altona (HLA) Equation
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Sample Availability
Appendix A
Mepartricin A and B | |||||
---|---|---|---|---|---|
Position | δC, Type | δH | JH,H (Hz) | ROE Contacts | |
Aglycone | |||||
1 | 170.88, | C | – | – | – |
2a | 43.67, | CH2 | 2.664 | 15.4 (2b), 9.2 (3) | 2b, 3, 4a |
2b | 2.948 | 15.4 (2a), 3.4 (3) | 2a, 3, 4b | ||
3 | 63.82, | CH | 4.963 | 9.2 (2a), 3.4 (2b), 8.5 (4a), 5.0 (4b) | 2a, 2b, 4a, 4b, 34, Me38 |
4a | 51.34, | CH2 | 2.836 | 8.5 (3), 17.2 (4b) | 2a, 3, 4b |
4b | 3.099 | 5.0 (3), 17.2 (4b) | 2b, 3, 4a | ||
5 | 208.49, | C | – | – | – |
6a | 51.30, | CH2 | 2.558 | 16.5 (6b), 1.9 (7) | 4a, 6b, 7 |
6b | 2.821 | 16.5 (6a), 9.6 (7) | 4b, 6a, 7 | ||
7 | 67.40, | CH | 4.698 | 1.9 (6a), 9.6 (6b), 2.0 (8a), 9.4 (8b) | 6a, 6b, 8a, 8b, 9, 28, 29 |
8a | 43.86, | CH2 | 1.334 | 2.0 (7), 13.5 (8b), 1.9 (9) | 6a, 7, 8b, 9, 10a |
8b | 1.773 | 9.4 (7), 13.5 (8b), 9.8 (9) | 6b, 7, 8a, 10b | ||
9 | 73.04, | CH | 4.217 | 1.9 (8a), 9.8 (8b), 2.0 (10a), 10.0 (10b) | 7, 8a, 10a, 11, 26, 28 |
10a | 44.34, | CH2 | 1.406 | 2.0 (9), 14.0 (10b), 1.8 (11) | 8a, 9, 10b, 11, 12a |
10b | 1.668 | 10.0 (9), 14.0 (10a), 10.3 (11) | 8b, 10a | ||
11 | 73.82, | CH | 4.269 | 1.8 (10a), 10.3 (10b), 2.1 (12a), 9.4 (12b) | 9, 10a, 12a, 13, 24, 26 |
12a | 44.09, | CH2 | 1.357 | 2.1 (11), 13.3 (12b), 1.9 (13) | 10a, 11, 12b, 13, 14a |
12b | 1.677 | 9.4 (11), 13.3 (12a), 9.9 (13) | 12a, 14b | ||
13 | 69.36, | CH | 4.751 | 1.9 (12a), 9.9 (12b), 2.1 (14a), 9.5 (14b) | 11, 12a, 14a, 22, 24 |
14a | 46.68, | CH2 | 1.730 | 2.1 (13), 14.5 (14b) | 12a, 13, 14b |
14b | 1.945 | 9.5 (13), 14.5 (14a) | 12b, 14a, 16b | ||
15 | 98.01, | C | – | – | – |
16a | 45.28, | CH2 | 1.734 | 12.4 (16b), 10.4 (17) | 16b, 18 |
16b | 2.536 | 12.4 (16a), 4.3 (17) | 14b, 16a, 17 | ||
17 | 66.34, | CH | 5.006 | 10.4 (16a), 4.3 (16b), 10.1 (18) | 16b, 18, 19 |
18 | 58.59, | CH | 2.809 | 10.1 (17), 10.2 (19) | 16a, 17, 19, 20a |
19 | 66.79, | CH | 5.082 | 10.2 (18), 10.5 (20a) | 17, 18, 20b, 22, 1′, 2′ |
20a | 37.72, | CH2 | 1.999 | 10.5 (19), 15.8 (20b) | 18, 20b, 21 |
20b | 2.447 | 15.8 (20a), 5.6 (21) | 19, 20a, 21, 1′ | ||
21 | 75.70, | CH | 4.936 | 5.6 (20b), 9.1 (22) | 20a, 20b, 22, 23, 1′ |
22 | 137.00, | CH | 6.507 | 9.1 (21), 15.4 (23) | 13, 19, 21, 24 |
23 | 129.99, | CH | 6.392 | 15.4 (22), 10.9 (24) | 21, 25 |
24 | 134.31, | CH | 6.753 | 10.9 (23), 15.5 (25) | 11, 13, 22, 26 |
25 | 132.85, | CH | 6.544 | 15.5 (24). 11.2 (26) | 23, 27 |
26 | 135.21, | CH | 6.789 | 11.2 (25), 15.2 (27) | 9, 11, 24, 28 |
27 | 125.11, | CH | 7.048 | 15.2 (26), 11.0 (28) | 25, 30 |
28 | 130.49, | CH | 6.616 | 11.0 (27), 11.5 (29) | 7, 9, 26, 29 |
29 | 128.25, | CH | 7.052 | 11.5 (28), 10.8 (30) | 7, 28, 32 |
30 | 124.88, | CH | 6.736 | 10.8 (29). 11.3 (31) | 27, 31 |
31 | 130.47, | CH | 6.275 | 11.3 (30), 10.9 (32) | 30, 33 |
32 | 128.11, | CH | 7.261 | 10.9 (31), 15.5 (33) | 29, 34 |
33 | 134.10, | CH | 6.370 | 15.5 (32), 11.2 (34) | 31, 35 |
34 | 133.17, | CH | 6.489 | 11.2 (33), 15.5 (35) | 3, 32, 36 |
35 | 137.63, | CH | 5.610 | 15.5 (34), 9.3 (36) | 33, 36, 37, Me36 |
36 | 40.05, | CH | 2.592 | 9.3 (35), 9.9 (37) | 34, 35, 37, 39ab, Me36, Me38 |
37 | 78.29, | CH | 5.109 | 9.9 (36), 2.3 (38) | 35, 36, 38, 39ab, Me36, Me38 |
38 | 33.88, | CH | 1.948 | 2.3 (37), ? (39ab)* | 37, 39ab, 40a, 40b, 41, Me36, Me38 |
39ab* | 30.77, | CH2 | A: 1.801 B: 1.799 | ? (38, 40a, 40b)* | 36, 37, 38, 40a, 40b, 41, Me36, Me38 |
40a | A: 35.65, B: 35.67, | CH | A: 1.918 B: 1.902 | ? (39ab)*, 15.9 (40b), 4.5 (41) | 38, 39ab, 40b, 41, 42a, 42b, Me38 |
40b | A: 1.853 B: 1.854 | ? (39ab)*, 15.9 (40a), 8.5 (41) | 38, 39ab, 40a, 42a, 42b | ||
41 | A: 68.35, B: 68.30, | CH | A: 4.589 B: 4.572 | 4.5 (40a), 8.5 (40b), 3.2 (42a), 9.3 (42b) | 38, 39ab, 40a, 42a, 45/45′ |
42a | A: 46.00, B: 45.95, | CH2 | A: 3.204 B: 3.183 | 3.2 (41), 15.4 (42b) | 40a, 40b, 41, 42b, 45/45′ |
42b | A: 3.390 B: 3.366 | 9.3 (41), 15.4 (42a) | 40a, 40b, 42a, 45/45′ | ||
43 | A: 197.72, B: 197.64, | C | – | – | – |
Me36 | 16.26, | CH3 | 0.971 | 6.7 (36) | 35, 36, 37, 38, 39ab |
Me38 | 13.01, | CH3 | 1.053 | 6.5 (38) | 3, 36, 37, 38, 39ab, 40a |
COOMe | 174.05, | C | – | – | – |
COOMe | 51.38, | CH3 | 3.696 | – | 2′, 3′ |
NHMe | A: 29.27, B: –, | CH3 | A: 2.791 B: – | – | 46/46′ |
Aromatic Moiety | |||||
45/45′ | A: 131.04, B: 131.21, | CH | 8.148 | 8.7 (46/46′) | 41, 42a, 42b, 46/46′ |
46/46′ | A: 110.91, B: 113.23, | CH | 6.783 | 8.7 (45/45′) | 45/45′, NHMe |
C*CO | A: 154.39, B: 154.21, | C | – | – | – |
C*NH | A: 126.16, B: 126.69, | C | – | – | – |
Mycosamine Moiety | |||||
1’ | 98.34, | CH | 4.906 | 1.8 (2′) | 2′, 3′, 5′, 19, 20b, 21 |
2’ | 71.19, | CH | 4.439 | 1.8 (1′), 3.4 (3′) | 1′, 3′, 19, COOMe |
3’ | 57.91, | CH | 3.120 | 3.4 (2′), 9.6 (4′) | 1′, 2′, 5′, COOMe |
4’ | 74.19, | CH | 3.806 | 9.6 (3′), 9.8 (5′) | 6′ |
5’ | 74.36, | CH | 3.669 | 9.8 (4)’, 6.1 (6′) | 1′, 3′, 6′ |
6’ | 18.37, | CH3 | 1.589 | 6.1 (5′) | 4′, 5′ |
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Coupling Protons (i,j) | Measured 3Ji/j (Hz) | Calculated 3Ĵi/j (Hz) | Absolute Difference between the Experimental and Calculated 3Ji/j (Hz) | ||
---|---|---|---|---|---|
41R | 41S | 41R | 41S | ||
H40a, H41 | 4.5 | 3.8 | 2.3 | 0.7 | 2.2 |
H40b, H41 | 8.5 | 8.7 | 9.7 | 0.2 | 1.2 |
H41, H42a | 3.2 | 3.1 | 4.5 | 0.1 | 1.3 |
H41, H42b | 9.3 | 9.2 | 6.0 | 0.1 | 3.3 |
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Szczeblewski, P.; Andrałojć, W.; Polit, J.; Żabka, A.; Winnicki, K.; Laskowski, T. Ipertrofan Revisited—The Proposal of the Complete Stereochemistry of Mepartricin A and B. Molecules 2021, 26, 5533. https://doi.org/10.3390/molecules26185533
Szczeblewski P, Andrałojć W, Polit J, Żabka A, Winnicki K, Laskowski T. Ipertrofan Revisited—The Proposal of the Complete Stereochemistry of Mepartricin A and B. Molecules. 2021; 26(18):5533. https://doi.org/10.3390/molecules26185533
Chicago/Turabian StyleSzczeblewski, Paweł, Witold Andrałojć, Justyna Polit, Aneta Żabka, Konrad Winnicki, and Tomasz Laskowski. 2021. "Ipertrofan Revisited—The Proposal of the Complete Stereochemistry of Mepartricin A and B" Molecules 26, no. 18: 5533. https://doi.org/10.3390/molecules26185533