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The BI-3802 was designed by Boehringer Ingelheim and could be obtained free of charge through the Boehringer Ingelheim open innovation portal opnMe.com, associated with its negative control.
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Antimycobacterial Rufomycin Analogues from Streptomyces atratus Strain MJM3502
Zhou, Bin ; Shetye, Gauri ; Yu, Yang ; Santarsiero, Bernard D. ; Klein, Larry L. ; Abad-Zapatero, Cele , et al.
Abstract: This study represents a systematic chem. and biol. study of the rufomycin (RUF) class of cyclic heptapeptides, which our anti-TB drug discovery efforts have identified as potentially promising anti-TB agents that newly target the caseinolytic protein C1, ClpC1. Eight new RUF analogs, rufomycins NBZ1-NBZ8, as well as 5 known peptides were isolated and characterized from the Streptomyces atratus strain MJM3502. Advanced Marfey's and X-ray crystallog. anal. led to the assignment of the absolute configuration of the RUFs. Several isolates exhibited potent activity against both pathogens M. tuberculosis H37Rv and M. abscessus, paired with favorable selectivity (selectivity index >60), which collectively underscores the promise of the rufomycins as potential anti-TB drug leads.
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CAS No. : | 3060-46-6 |
Formula : | C7H15NO2 |
M.W : | 145.20 |
SMILES Code : | CC(C)C[C@H](NC)C(O)=O |
MDL No. : | MFCD00065919 |
InChI Key : | XJODGRWDFZVTKW-LURJTMIESA-N |
Pubchem ID : | 2777993 |
GHS Pictogram: |
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Signal Word: | Warning |
Hazard Statements: | H302-H315-H319-H335 |
Precautionary Statements: | P261-P305+P351+P338 |
* All experimental methods are cited from the reference, please refer to the original source for details. We do not guarantee the accuracy of the content in the reference.
Yield | Reaction Conditions | Operation in experiment |
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The following can be prepared in a similar way: (S)-Z-N-Methylglycine, (S)-Z-N-methylalanine, (S)-Z-N-methyl-S-benzylcysteine; (S)-Z-N-methylleucine, (S)-Z-N-methylmethionine, (S)-Z-N-methyl-O-benzylthreonine. | ||
0.85 g (46%) | methyl-L-leucine (NPC 15273) A suspension of N-[(9H-fluoren-9-ylmethoxy)carbonyl]-L-leucine (1.67 g, 5 mmol) in toluene(100 ml) was charged with paraformaldehyde (1 g, 33.3 mmol) and 4-toluenesulfonic acid (100 mg, catalytic). The mixture was refluxed for 30 minutes in a Dean Stark apparatus for azeotropic distillation. The solution was washed with a saturated solution of sodium bicarbonate (*2), dried over magnesium sulfate and evaporated. The resulting oil in a 1:1 mixture of chloroform:trifluoroacetic acid (50 ml), at room temperature, was charged with triethylsilane (2.38 ml, 15 mmol). Stirring was continued for 22 hr. The solvents were removed in vacuum and the oil was crystallized from a mixture of ether:hexane. Recrystalyzation from EtOAc:hexane afforded 0.85 g (46%) of the product as a colorless solid, mp 101-3 C. | |
Characterising data Physical and spectral properties of MM 45289 after drying over P2O5: FAB-MS (glycerol/thioglycerol/trifluoroacetic acid) MH+1557+-1 Molecular Weight: 1556 Molecular Formula: C73H89N10O26Cl UV (H2O) lambdamax280 nm (epsilon 6215) [alpha]D20 -118 (c = 0.97% in H2O) IR (kBr) 1660, 1590, 1500, 1070 cmmin1 1H NMR in DMSO d6 at 358K. Tetramethylsilane as internal standard. deltaH 8.45 (1H, broad s), 8.23 (1H, br d, J ca.5Hz), 7.95 (1H, br d, J ca.5Hz), 7.63 (1H, d, J 8.0Hz), 7.52 (1H, d, J 8.3Hz), 7.39 (1H, s), 7.33 (1H, br d), 7.23 (1H, d, J 8.3Hz), 7.12 (1H, s), 7.1 (1H, br d), 6.97 (1H, d, J 8.0Hz), 6.76 (1H, dd, J 8.4 and 2.0Hz), 6.68 (1H, d, J 8.4Hz), 6.45 (1H, d, J 2.0Hz), 6.33 (1H, d, J 2.0Hz), 5.68 (1H, br), 5.63 (1H, s), 5.50 (1H, d, J 7.4Hz), 5.43 (1H, s), 5.27 (2H, overlapping), 5.13 (1H, d, J ca.2Hz), 4.70 (2H, overlapping), 4.50 (1H, d, J 6Hz), 4.47 (1H, d, J 6.1), 4.33 (1H, br), 4.21 (1H, br), 4.13 (1H, dq, J 6.0 and 9.6Hz), 3.75 - 3.30 (7H, overlapping), 3.00 (1H, dd, J 7.8 and 5.8Hz) 2.88 (1H, d, J 9.6Hz), 2.86 (lH, d, J 9.6Hz), 2.58 (lH, dd, J 15.8 and 4.0Hz), 2.32 (3H, s), 2.17 (lH, dd, 15.8 and 6.8Hz), 1.90 (1H, br d, J ca.13Hz), 1.82 (1H, d, J 13.7Hz), 1.77 (1H, m), 1.60 (2H, overlapping, J 13.5 and 4.4Hz), 1.52 (1H, m), 1.42 (1H, m), 1.18 (3H, d, J 5.9Hz), 1.13 (6H, s), 1.09 (3H, d, J 6.0Hz), 0.92 (3H, d, J 6.6Hz), 0.89 (3H, d, J 6.6Hz) ppm. Acid Hydrolysis (6MHCl/110/18hrs/N2/sealed tube) gives aspartic acid and N-methyl leucine. Physical and spectral data on MM 47756: FAB-Ms (thioglycerol/glycerol) MH+ 1523+-1 Molecular Weight: 1522 Molecular Formula: C73H90N10O26 1H NMR in DMSO d6 at 353K, Tetramethylsilane as internal standard. Inter alia 7.61 (2H, d, J ca.8.0Hz), 7.4 - 7.2 (3H, overlapping m), 7.13 (1H, dd, J 8.0 and 2.0Hz), 7.10 (1H, d, J 2.0 Hz), 7.07 (1H, dd, J 8.0 and 2.0Hz), 6.97 (1H, dd, J 8.0 and 2.0Hz), 6.76 (1H, dd, J 8.5 and 2.0Hz), 6.68 (1H, d, J 8.5Hz), 6.40 (1H, d, J 2.2Hz), 6.35 (1H, d, J 2.2Hz) ppm. |
The following compounds can be prepared in a similar way: (S)-Z-N-Methylalanine; (R)-Z-N-Methylalanine; (+/-)-Z-N-Methylalanine; (S)-Z-N-Methylleucine; (R)-Z-N-Methylleucine; (+/-)-Z-N-Methylleucine; Z-N-Methylglycine; ... |