Spinosyn A 17-pseudoaglycone
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| Category | Others |
| Catalog number | BBF-04289 |
| CAS | 131929-68-5 |
| Molecular Weight | 590.74 |
| Molecular Formula | C33H50O9 |
| Purity | >95% by HPLC |
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Description
It is an acid degradation product produced by selective hydrolysis of the more labile forosamine saccharide in the 17-position of spinosyn A. It has weak activity as an insecticide.
Specification
| Synonyms | A 83543A pseudoglycone; 2',3',4'-O-methyl-rhamnosyl tetracyclic spinosyn pseudoaglycone; (2R,3aS,5aR,5bS,9S,13S,14R,16aS,16bR)-9-ethyl-13-hydroxy-14-methyl-2-{[(3R,4R,5S,6S)-3,4,5-trimethoxy-6-methyloxan-2-yl]oxy}-1H,2H,3H,3aH,5aH,5bH,6H,7H,9H,10H,11H,12H,13H,14H,15H,16aH,16bH-as-indaceno[3,2-d]oxacyclododecane-7,15-dione |
| Storage | Store at -20°C |
| IUPAC Name | (1S,2R,5S,7R,9R,10S,14R,15S,19S)-19-ethyl-15-hydroxy-14-methyl-7-[(2R,3R,4R,5S,6S)-3,4,5-trimethoxy-6-methyloxan-2-yl]oxy-20-oxatetracyclo[10.10.0.02,10.05,9]docosa-3,11-diene-13,21-dione |
| Canonical SMILES | CCC1CCCC(C(C(=O)C2=CC3C4CC(CC4C=CC3C2CC(=O)O1)OC5C(C(C(C(O5)C)OC)OC)OC)C)O |
| InChI | InChI=1S/C33H50O9/c1-7-20-9-8-10-27(34)17(2)29(36)26-15-24-22(25(26)16-28(35)41-20)12-11-19-13-21(14-23(19)24)42-33-32(39-6)31(38-5)30(37-4)18(3)40-33/h11-12,15,17-25,27,30-34H,7-10,13-14,16H2,1-6H3/t17-,18+,19-,20+,21-,22-,23-,24-,25+,27+,30+,31-,32-,33+/m1/s1 |
| InChI Key | KSCLXDPNSMLYPU-YDZPRSSASA-N |
| Source | Semi-synthetic |
Properties
| Appearance | White Solid |
| Antibiotic Activity Spectrum | Parasites |
| Boiling Point | 729.5±60.0°C at 760 mmHg |
| Density | 1.2±0.1 g/cm3 |
| Solubility | Soluble in Ethanol, Methanol, DMF, DMSO |
Reference Reading
1. Conversion of spinosyn A and spinosyn D to their respective 9- and 17-pseudoaglycones and their aglycones
J W Paschal, H A Kirst, L C Creemer J Antibiot (Tokyo) . 1998 Aug;51(8):795-800. doi: 10.7164/antibiotics.51.795.
Forosamine at the 17-position of spinosyns A and D was hydrolyzed under mild acidic conditions to give the corresponding 17-pseudoaglycones. The tri-O-methylrhamnose at the 9-position of the 17-pseudoaglycone of spinosyn A was hydrolyzed under more vigorous acidic conditions to give the aglycone of spinosyn A. However, these conditions led to decomposition of the 17-pseudoaglycone of spinosyn D, presumably due to more facile protonation of the 5,6-double bond to produce a tertiary carbonium ion which undergoes further rearrangements. Spinosyns J and L (3'-O-demethyl spinosyn A and D, respectively) obtained from fermentation of biosynthetically-blocked mutant strains of Saccharopolyspora spinosa, were oxidized to give the corresponding 3'-keto-derivatives and the resultant keto-sugars were then beta-eliminated under basic conditions to give the 9-pseudoaglycones of spinosyns A and D respectively. Forosamine at the 17-position of the 9-pseudoaglycone of spinosyn D was then readily hydrolyzed to yield the aglycone of spinosyn D.
2. Spinosyn g: proof of structure by semisynthesis
Paul R Graupner, Jacek Martynow, Peter B Anzeveno J Org Chem . 2005 Mar 18;70(6):2154-60. doi: 10.1021/jo048173k.
[reaction: see text] Spinosyn G was isolated in the late 1980s as a minor component from the broth of our potent, fermentation-derived insecticide spinosad. Its structure was then tentatively identified as 5' '-epispinosyn A (3) on the basis of (1)H and (13)C NMR data, but the 4' '-epi compound 4 could not be conclusively ruled out with the data available. Described herein are unambiguous syntheses of both 3 and 4, whereby 3 was proved identical to the natural product. Compound 4 was prepared from intact spinosyn A by a novel F-TEDA-promoted oxidative deamination to the 4' '-ketone 5, stereoselective reduction to the equatorial alcohol 6, and nitrogen incorporation via the axial azide 7. Compound 3 was obtained by coupling spinosyn A 17-pseudoaglycone (9) with the N-protected dihydropyran 16 derived from methyl l-ossaminide (14). This gave an approximately 2:1 mixture of anomeric products 17 with the desired equatorial glycoside predominating, which was then converted to 3 by N-deprotection and methylation.
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Bio Calculators
* Our calculator is based on the following equation:
Concentration (start) x Volume (start) = Concentration (final) x Volume (final)
It is commonly abbreviated as: C1V1 = C2V2
* Total Molecular Weight:
g/mol
Tip: Chemical formula is case sensitive. C22H30N4O √ c22h30n40 ╳
