MXPA97002124A - Novedous sphingolipids and its procedimie - Google Patents

Novedous sphingolipids and its procedimie

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Publication number
MXPA97002124A
MXPA97002124A MXPA/A/1997/002124A MX9702124A MXPA97002124A MX PA97002124 A MXPA97002124 A MX PA97002124A MX 9702124 A MX9702124 A MX 9702124A MX PA97002124 A MXPA97002124 A MX PA97002124A
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alkenyl
straight
alkyl
formula
branched chain
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MXPA/A/1997/002124A
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Spanish (es)
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MX9702124A (en
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Hamilton Young David
Arthur Moreau Robert
Ross Ronald Jr
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Rohm And Haas Asiainc
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Abstract

The present invention relates to a process for novel sphingolipids and other secondary compounds, based on sphingosine, which comprises the cultivation of an appropriate fungus, the removal of mycelium from the fungus and the isolation of the sphingolipid from the mycelium. Sphingosine-based materials inhibit protein kinase C, provide an anti-inflammatory effect and anti-tumor effect, and these sphingosine-based materials provide protection to plants against pathogenic microorganisms

Description

NOVEDOUS SPHINGOLIPIDS AND THEIR PROCEDURE The present invention relates to a process for the preparation of sphingolipids. In addition, some of the sphingolipids of this invention possess a polyunsaturated, branched, very unusual sphingosine half that has been previously reported (in the Kenneth L. Rinehart et al., "Ophidiacerebrosides: Cytotoxic Glycosphingolipids Containing a Novel Sphingosine from a Sea Star" (Ofidiacerebrosides: Cytotoxic glycosphingolipids containing a novel Sphingosine from a Starfish), J. Org Chem .1994 (59), pp. 144-147) which is present in the cytotoxic cerebrosides of starfish. Sphingosines and sphingolipids exert many effects on mammary cells [reviewed by S. Spiegel and S. Milstein, J. Membrane Biol. 146, 225 (1995)] and are useful as inhibitors of protein kinase C (US Patent 4,937,232) where said sphingosines and sphingolipids can be of therapeutic value in a number of disease states such as cancer, rheumatic arthritis, complication diabetic, diseases of the central nervous system, etc. In addition, inesitol sphingophospholipids and ceramide inoethylphosphonate represent two types of sphingolipids, which have been described in fungi of the Oomycetos class and which demonstrate biological activity. The sphingophospholipids of Phytophthora capsici have a protective effect on pepper plants against pathogenesis by P. Capsici (European Journal Qf Bíochsmístry) (European Journal of Biochemistry, 1990 (191), pp. 203-209). The ceramide aminoethyl phosphonate of Phytophthora infestans is reported to cause the accumulation of phytoalexins (Physiological and Molecular Plant Pathology) in the plant tissue, an abundance of the plant's tissue and plant pathology, 1986 (28), pp. 215-225). response frequently associated with the activation of disease resistance mechanisms. The present invention relates to a novel sphingolipid that has not been previously described. The process of this invention for the preparation of sphingolipids is novel and considerably more convenient than the isolation of said sphingolipids from starfish, or alternatively, by means of a laborious total synthetic procedure such as that described in the Richard. R. Schmidt et al., "Sphingosines - an Oxa-Cope Rearrangement Route for Their Synthesis", (Sphingosines - an Oxa-Layer Adaptation Route ", Synthesis, pp. 868-876 (July, 1995) This invention employs fungi , preferably Oomycete fungi, as a convenient source of desired sphingolipids After the isolation of the desired sphingolipid, the sphingolipid can be conveniently modified, if desired, in a sphingolipid child, from which the sphingolipid stem is subjected to hydrolytic conditions to remove the original head group and / or the fatty acid half, to produce a ceramide or a sphingosine phosphorylethanolamine. Amide or sphingosine phosphorylethanolamine can then be modified using techniques that are well known to a person skilled in the art, to produce a wide variety of compounds based on sphingosine daughters. The fungi Oo icetos can be subdivided into six orders according to "The Present Status of Classification of Biflagellate Fungi" (The Present State of Classification of the Biflagellate Fungi), p. 213-222 (1976) by F.K. Sparrow in Recent Advances in Aquatic Mycology (Recent Advances in Aquatic Mycology), E.B. Gareth Jones, editor, published by John Wiley (New York): Euricasmales, Saprolegniales, Lagenidiales, Peronsoporales, Traustoquitriales and Labirintulales. Said fungi Oomycetes can be cultured using various liquid or solid growth media, defined naturally or chemically, such as those described in "A Source Book of the Genus Phytophthora" (A Source Book of the Phytophthora Genus), by O.K. Ribeiro, published by A.R. Gantner Verlag, Vaduz, Germany. Examples of such natural media are the medium of the V-8 juice, the medium of the lime seed, the dextrose medium of the potato, the medium of the oat grain, the medium of the pea juice, the modified medium of the carrot, means of flour of a red bean, means of flour of corn, means of extract of a seed of rapeseed and means of extract of a seed of rye. Examples of chemically defined media include those described by Ribeiro in the same reference (pp. 79-99). One embodiment of this invention is a process for preparing a novel sphingolipid of the formula: OH N s. H R4a (I) wherein R4a is C (0) R8a; R8a is (Cn-C23) alkyl, (C13-C23) alkenyl or poly (Ci3-C23) alkenyl, all of which may be straight or branched chain; X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; and the enantiomorphs and structural isomers thereof; comprising the following steps: (i) cultivating an appropriate fungus (ii) collecting the mycelial harvest in said fungus, and In a preferred embodiment, the process for preparing a sphingolipid of the formula (I) wherein X is alkyl (C? 0-C20), alkenyl (C? 0-C20) or poly (C? 0-C2o) alkenyl, all these may be straight or branched chain; comprises cultivating an appropriate Oomycete fungus in step (i). In a more preferred embodiment, the process produces a sphingolipid of the formula (I), wherein X is alkenyl (C? 0-C20) or poly (C? 0-C2o) alkenyl, all these can be straight or branched chain . In an even more preferred embodiment, the process produces a sphingolipid of the formula (I), wherein X is a branched-chain alkanaryl (Ci4-C? 8) or a straight-chain (C11-C15) alkenyl and R8a is a (C13-C23) alkyl, (C? 3-C23) alkenyl or straight chain poly (C? 3-C23) alkenyl all. The following examples are intended to illustrate, but not limit, the scope of this embodiment of the invention.
Example 1: Isolation and Characterization of Sphingolipids from Pynthium ulumum Pynthiumumumumum (ATCC 26083) was obtained from the "American Type Culture Collection" (Collection of Cultures of Pynthiumumumum (ATCC 2 083) obtained from the "American Type Culture Collection" and maintained on a potato dextrose agar (Difco Laboratories) Petri dishes of 9 cm in diameter, containing 20 ml of a medium Sucrose-asparagine liquid [Erwin, DC and Katznelsoi, K., (1971), "Canadian Journal of My Crobiol ogy 7" (Canadian Journal of Microbiology 7), page 15] were inoculated with a 7 mm mycelium plug. in diameter, taken from the growing edge of a culture grown on a potato dextrose agar The discs were covered for 48 hours at 25 ° C, by shaking on a rotary shaker at 60 rpm The mycelium was then lifted by Filtration in df fiberglass filters, washed with water and dried by The largest sphingolipid of Pynthium ulumum was extracted and isolated as described in Example 4 and is shown in FIG.
Formula (IA). The sphingolipid structure of the Formula (IA) was determined by mass spectrometry and nmr using methods well known to those skilled in the art. Heterogeneity was found in the fatty acid component of the sphongolipid.
Sphingolipid of Formula A: Example 2: Isolation and characterization of sphingolipids from Phytoph thora infestans: Phytophthora infestans (Stretching) was maintained in the medium of pea juice or rye A agar [EC. Caten and J.L. Jinks, (1968), "Canadian Journal of Botany" (Canadian Journal of Botany) 46, page 329]. The medium of the pea juice was prepared by means of the autoclave of 283 gr. of frozen peas in one liter of distilled water, the peas were vigorously shaken in an autoclave and sieved through a thin cloth. 20 gr. of the agar to the filtrate, which was then autoclaved again, before emptying the culture plates. The petri disks of 9 cm. in diameter, which contained 20 ml. of the sucrose-aspargine liquid medium were inoculated with a 7 mm mycelium plug. in diameter, taken from the growing edge of a culture grown in the middle of pea juice or rye A agar. The discs were incubated for 20 days at 25 ° C by shaking on a rotary shaker at 60 rpm. The mycelium was then lifted by filtration on fiberglass filters, washed with water and dried by freezing. The sphingolipid major from the Phytophthora infestans was extracted and isolated as described in Example 4 and shown in Formula (IB). Heterogeneity was found in the fatty acid component of the heterogeneity in the fatty acid component of the sphingolipid. The structure of the sphingolipid of Formula (IB) was determined by mass spectrometry and nmr using methods well known to those skilled in the art.
Esfingolipido of the Formula IB: Example 3: Isolation and characterization of sphingollids from Phytoph thora capsi ci Phytoph thora capsi ci (ATCC 15399) was maintained on a V-8 juice agar with a pH of 7.0, containing 200 ml. of juice V-8, 4 gr. of CaC03 and 20 gr. of agar per liter. The petri disks of 9 cm. in diameter, which contained 20 ml. of the sucrose-aspargine liquid medium were inoculated with a 7 mm mycelium plug. in diameter, taken from the growth edge of a culture grown on V-8 juice agar. The discs were incubated for 96 hours at 25 ° C with agitation on the rotary shaker at 60 rpm. The mycelium was then lifted by filtration in the glass fiber filters, washed with water and dried by freezing.
Two larger sphingolipids identical to the above Formulas (IA) and (IB) were isolated from Phytophthora capsici, as described in Example 4. Example 4: Lipid Extraction and Isolation Procedure by Chromatography. The sphingolipids were extracted from the lyophilized fungal cells (20 mg.) Prepared in Examples 1, 2 and 3, using chloroform (8 ml.), Methanol (16 ml.), Water (4.6 ml.) By homogenization for 30 minutes. seconds with a Polytron Homogenizer (Brinkman) in a tube with the threaded top, 20 x 200 mm., fitted with a Teflon cap. After homogenization, additional chloroform (8 ml.) And water (8 ml.) Were added. The extracts were mixed by inverting them 30 times and the extract was centrifuged at 70 x g for 10 minutes, twice, to separate the phases. The lower phase of chloroform was removed, evaporated under a stream of nitrogen gas, redissolved in 1 ml. of chloroform / methanol (85/15, v / v) and filtered through glass wool. All the lipid extract (6-20 mg in 1 ml.) Was separated by semi-preparative HPLC. The column (10 x 250 mm.) Contained LiChrosorb Silica, 10 microns, 60 Angstroms, and the mobile phase gradient was: A) hexane, B) isopropanol and C) 0.04% triethylamine in water at a flow rate of 5. ml./min. The time of the linear gradient was: 0 minutes, 100/0/0; 8 minutes, 100/0/0; 13 minutes, 95/5/0; 18 minutes, 85/15/0; 23 minutes, 40/60/0, 61 minutes, 40/51/9; 76 minutes, 40/51/9; 81 minutes, 40/60/0; 86 minutes, 100/0/0; 100 minutes, 100/0/0; for% A /% B /% C, respectively. The HPLC system of the quaternary gradient was a Model 1050 from Hewlett Packard. The injector was a model 7125 Rheodine, adjusted with a fixed magnifying glass of 1.0 ml. The column jet was broken with a Valco "T", 97% of the sample was collected in a test tube and 3% of the sample was detected by means of a Varex Mark II Evaporable Light Scattering Detector operated at 40 ° C, with nitrogen acting as an atomizing gas at 20 psi. Under these conditions, the phosphatidylethanolamine was eluted at a retention time of 48 minutes, the ceramide-PE (the sphingolipid of Formula B) from the Phytophthora infestans was collected in approximately 49 minutes and the ceramide-PE (the sphingolipid from Formula IA) from Pynthium ul timum was collected in approximately 50 minutes. The lipids from Phytophthora capsici contained two peaks of ceramide-PE, one (Formula IB) was collected in 49 minutes and the second (Formula IA) in 50 minutes. A second embodiment of the present invention concerns a process for the preparation of sphingosines, sphingosinephosphorylethanolamines and ceramides from the novel sphingolipids produced by the process described in the previous embodiment. These sphingosines, described in the previous modality. These sphingosines, sphingosinephosphorylethanolamines and ceramides are extremely useful as compounds used in the preparation of other subsequent sphingolipids, which are novel, as well as known and useful. Thus, this embodiment provides a method for preparing sphingosines, sphingosinephosphorylethanolamines and ceramides, comprising the following steps: (i) cultivating an appropriate fungus (ii) raising the mycelium harvest of said fungus, (iii) isolating the sphingolipid from said mycelium. the formula where R < a is C (0) R8a; R8a is (C? 3-C23) alkenyl (C? 3-C23) or poly (C13-C23) alkenyl alkyl, all of these may be straight or branched chain; X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; and (iv) modifying said sphingolipid by selective hydrolysis to form (a) a sphingosine of the formula (II) wherein X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; (b) a sphingosine phosphorylethanolamine of the formula (neither: (neither) wherein X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; or (c) a ceramide of the formula (IV) (IV) R4a is C (0) R8a; R8a is (C13-C23) alkyl, (C3-C23) alkenyl or (C13-C23) alkenyl poly, all these may be straight or branched chain; X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; and the enantiomorphs and structural isomers of these. In a preferred embodiment, the process for preparing a sphingosine of the formula (II), a sphingosinephosphorylethanolamine of the formula (III) or a ceramide of the formula (IV), wherein X is (C10-C20) alkyl, alkenyl (C) ? 0-C20) or poly (C? 0-C2o) alkenyl, all these may be straight or branched chain; includes cultivating an appropriate Oomycete fungus at the stage (i) In a more preferred embodiment, the process produces a sphingosine of the formula (II), a sphingosinephosphorylethanolamine of the formula (III) or a ceramide of the formula (IV), wherein X is (C10-C20) alkenyl or poly (C) ? 0-C20) alkenyl, all these can be straight or branched chain. In an even more preferred embodiment, the process produces a sphingosine of the formula (II), a sphingosinephosphorylethanolamine of the formula (III) or a ceramide of the formula (IV), wherein sphingosinephosphorylethanolamine of the formula (III) * or a ceramide of the formula (IV), wherein X is a branched chain (C14-C? 8) alktrienyl or a straight chain (C11-C15) alkenyl and R8a is a (C13-C23) alkyl, alkenyl (C? 3 -C23) or straight chain poly (Ci3-C23) alkenyl all. The following compounds can be made and are intended to illustrate, but not limit, the scope of this embodiment of the invention: Sphingosine of Formula IIA Sphingosine of Formula IIB Sphingosinephosphorylethanolamine of the Formula IIIA Sphingosinephosphorylethanolamine of Formula IIIB Ceramide of Formula IVB Sphingosines IIA and HB, sphingosine phosphorylethanol inas IIIA and IIIB and ceramides IVA and IVB above, can be made from sphingolipids IA and IB using the procedures described in Examples 5-10, which are intended to illustrate, but not limit , the scope of the invention.
Example 5: Conversion of IA to IIA Sphingolipid IA is converted to sphingosine IIA by methanolysis in methanolic HCl (1N) according to the method of Gaver, R.C. and Sweeley, C.C. (1965) J. Am. Oil Chem. Soc, 42: 294-298. After the methanol, the methanol and HCl are removed by evaporation in a stream of nitrogen at room temperature. Espingosine IIA is purified from chloroform / methanol, 85/15, v / v, and injected into the semi-prepared HPLC system described for the initial purification of sphingolipid IA. In this HPLC system, espingosine IIA escapes in a retention time of approximately 34 minutes.
Example 6: Conversion of IB to IIB Sphingolipid IB is converted to sphingosine IIB by hydrolysis in methanolic HCl (IN) according to the method of Gaver, R.C. and Sweely, C.C. (1965) J. Am. Oil Chem. Soc. 42: 294-298. After methanolysis, the methanol and HCl are removed by evaporation under a stream of nitrogen at room temperature. Sphingosine IIB is purified from the starting material and any other contaminating material by re-dissolving the hydrolyzate in 1 ml. of chloroform / methanol, 85/15, v / v and injecting it into the semi-prepared HPLC system described for the initial purification of sphingolipid IA. In this HPLC system, sphingosine IIB escapes in a retention time of approximately 36 minutes. Example 7: Conversion of IA to IIA Sphingolipid IA becomes sphingosinephosphorylethanolamine IIA or by a) alkaline hydrolysis according to the Neuenhofer method, S., Schwarsmann, G., Egge, H., Snadhoff, K. (1985) "Biochemistry" (Biochemistry) 24: 525-529 or by b) enzymatic hydrolysis with N-diacylase of sphingolipid ceramide, according to with the method of Ito, M., Kurita, T. and Kita, K. (1995) J. Biol. Quim 270: 24370-3 '4. Sphingosinephosphorylethanolamine IIIA is purified from the starting material and any other contaminating material by re-dissolving the hydrolyzate in 1 ml. of chloroform / methanol, 85/15, v / v and injecting it into the semi-prepared HPLC system described for the initial purification of sphingolipid IA. In this HPLC system, sphingosine phosphorylethanolamine IIIA escapes in a retention time of approximately 54 minutes.
Example 8: Conversion of the IB into the IIIB The sphingolipid IB is converted into sphingosine phosphorylethanolamine IIIB or by a) alkaline hydrolysis, according to the method of Neuenhofer, S., Schwarzmann, G., Egge, H., Sandhoff, K. (1985) "Bi ochemistry" (Biochemistry ) 24: 525-529 or by b) enzymatic hydrolysis with N-diacylase from sphingolipid ceramide, according to the method of Ito, M., Kurita, T. and Kita, K. (1995) J. Bi ol. Chem 270: 24370-374. Sphingosine phosphorylethanolamine IIIB is purified from the starting material and any other contaminating material by re-dissolving the hydrolyzate in 1 ml. of chloroform / methanol, 85/15, v / v and injecting it into the semi-prepared HPLC system described for the initial purification of sphingolipid IA. In this HPLC system, sphingosine phosphorylethanolamine IIIB escapes in a retention time of approximately 55 minutes.
Example 9: Conversion of the AI to the VAT The sphingolipid IA is converted into the ceramide IVA by means of the treatment with phospholipase C, according to the method of Morrison, W.R. (1969) Bi oquim. Biofis Minutes 176: 537-546. VAT ceramide is purified from the starting material and any other contaminating material by re-dissolving the hydrolyzate in 1 ml. of chloroform / methanol, 85/15, v / v and injecting it into the semi-prepared HPLC system described for the initial purification of sphingolipid IA. In this HPLC system the VAT ceramide escapes in a retention time of approximately 22 minutes.
Example 10: Conversion of IB to IVB Sphingolipid IB is converted to IVB ceramide enzymatically by treatment with phospholipase C, according to the method of Morrison, W.R. (1969) Biochim. Biophys. Minutes 176: 537-546. Ceramide IVB is purified from the starting material and any other contaminating material by re-dissolving the hydrolyzate in 1 ml. of chloroform / methanol, 85/15, v / v and injecting it into the system by re-dissolving the hydrolyzate in 1 ml. of chloroform / methanol, 85/15, v / v and injecting it into the semi-prepared HPLC system described for the initial purification of sphingolipid IA. In this HPLC system, the IVB ceramide escapes in a retention time of approximately 23 minutes. In a third embodiment of this invention, there is provided a method for preparing secondary sphingolipids or children of formula V wherein R5 is a hydrogen atom, hydroxyl, raercapto, amino, monosubstituted amino, disubstituted or a disubstituted amino in which the two substituents, together with the nitrogen atom, to which they are attached, form a nitrogen atom containing a heterocyclic ring with 3 to 7 members, 0C (0) R6 or OR6, or together with the carbon, to which it is attached, forms a keto group; R6 is alkyl (Ci-Cs), alkenyl (C2-C6). (C2-C6) alkynyl, aralkyl or heterocyclylalkyl; R3 and R4 are, independently, a hydrogen atom, lower alkyl, C (0) R8, C (0) OR8 or together with the nitrogen atom, to which they are attached, form a nitro group or a hydrogen atom. nitrogen containing a heterocyclic ring with 3 to 7 members; R8 is (C1-C23) alkyl, (C2-C23) alkenyl, poly (C4-C23) alkenyl, (C2-C23) alkynyl, aralkyl or heterocyclylalkyl, which is cyclic, straight or branched chain, and which can be substituted by one or more conventional pharmaceutically acceptable substituents, such as halo, nitro hydroxyl and the like, and the enantiomorphs and structural isomers thereof; comprising steps (i), (ii), (iii) and (iv) of the second embodiment and (v) reacting a sphingosine of the formula (II), a sphingosinephosphorylethanolamine of the formula (III) or a ceramide of the formula (IV) with one or more organic reactants suitable for forming the sphingolipid of the formula (V). In a preferred embodiment, the process produces a sphingolipid child of the formula (V), wherein R5 is a hydrogen atom, hydroxyl, mercapto, amino, monosubstituted amino, disubstituted amino, OC (0) R6 or OR6, or together with the carbon, to which it is attached, forms a keto group; R6 is (C6C6) alkyl, (C2-C6) alkenyl, (C2-C6) alkynyl, aralkyl or heterocyclylalkyl, which is cyclic, straight or branched chain, and which can be substituted by one or more conventional substituents, pharmaceutically acceptable, such as halo, nitro, hydroxyl and the like; Q is a hydrogen atom, hydroxy, mercapto, NR1R2, formyl, alkanoyl, OC (0) R6, OR6, a substituted phosphate or phosphate, a substituted phosphonate or phosphonate, a nucieotide, a nucleoside, a polynucleotide, a polynucleoside, a amino acid, a peptide, a saccharidase or a polysaccharidase; R1 and R2 are, independently, a hydrogen atom, lower alkyl, C (0) R7, C (0) OR7 or together with the nitrogen atom, to which they are attached, form a nitro group or a nitrogen atom containing a heterocyclic ring with 3 to 7 members; R7 is alkyl, alkenyl, alkynyl, aralkyl or heterocyclylalkyl, which is cyclic, straight or branched chain, and which can be substituted by one or more conventional, pharmaceutically acceptable substituents, such as halo, nitro hydroxyl and the like; R3 and R4 are, independently, a hydrogen atom, lower alkyl, C (0) R8, C (0) OR8 or together with the nitrogen atom, to which they are attached, form a nitro group or a nitrogen atom containing a heterocyclic ring with 3 to 7 members; R8 is alkyl (C? -C23), alkenyl (C2-C23), poly (C4-C23) alkenyl, (C2-C23) alkynyl, aralkyl or heterocyclylalkyl, which is cyclic, straight or branched chain, and which can substituted by one or more conventional, pharmaceutically acceptable substituents, such as halo, nitro, hydroxyl and the like; and the enantiomorphs and structural isomers of these. In a more preferred embodiment, the process produces a sphingolipid child of formula (V), wherein Q is selected from the group consisting of hydroxyl, glycyl, arginyl, lysyl, galactosyl, sulfogalactosyl, glucosyl, inositol, lactosyl, trihexosyl, phosphorylcholine. , phosphorylethanolamine, GalNAc-Gal-Glc, Gal-Gal-Glc, Sia-Gal-Glc, Gal-GalNAc GalNAc I and I Sia-Gal-Glc Sia-Gal-Glc.
In an even more preferred embodiment, the process produces a sphingolipid child of the formula (V), wherein Q is glucosyl, R8 is CH (OH) - (CH2) nCH3 and n is 11-21. By GalNAc is meant N-acetyl gallatosamine; Glc is understood to mean glucose; by Gal is meant galactose and by Sia sialic acid. By trihexosyl is meant polysaccharidase composed of three hexoses such. By GalNAc is meant galatose ina N-acetyl; Glc is understood to mean glucose; by Gal is meant galactose and by Sia sialic acid. By trihexosyl is meant polysaccharidase composed of three hexoses such as galactoa, glucose, mannose, etc. Both the D and L isomers are contemplated. Examples of compounds that can be made by the method of the latter mode include, but are not limited to the following: In a fourth embodiment of this invention there is provided a method comprising contacting a mammary cell with a therapeutic amount of a compound of the formula (I), (II), (111), (IV) or (V) in the presence of a pharmaceutically acceptable carrier for Innibir protein kinase C, to provide anti-inflammatory or anti-tumor effect In a fifth embodiment of the present invention, a method is provided. op aa-l'j ^ j treatment of a plant with na i quantity) r »ncm? Effective amen of a compound of the formula (i, (II, tlll), (IV) or (V) in the presence of an agronomically acceptable carrier to provide a protothelial artifact of pathogenic microorganisms. in The plant.

Claims (17)

Claims
1. A process for preparing a sphingolipid of the formula: wherein R4a is C (0) R8a; Rβa is (C ?3-C23) alkyl, (C ?3-C23) alkenyl or poly (C ?3-C23) alkenyl, all of which may be straight or branched chain; X is a straight or branched chain alkyl, alkenyl or polyalkenyl; and the enantiomorphs and structural isomers thereof; comprising the following steps: (i) cultivating an appropriate fungus, (ii) raising the mycelium harvest of said fungus, and (iii) isolating the sphingolipid from said mycelium.
2. The process according to claim 1, for preparing a sphingolipid of the formula (I), wherein X is (C10-C20) alkyl, (C ?O-C20) alkenyl or (C10-C2o) alkenyl (C C) alkenyl, all these can be straight or branched chain; comprising cultivating an appropriate Oomycete fungus in step (i).
The process according to claim 2, for a sphingolipid of the formula (I), wherein: X is alkenyl (C? O-C2u) or poly (C? 0-C20) alkenyl, all these can be Straight or branched chain.
The process according to claim 3, for a sphingolipid of the formula (I), wherein: X is a branched-chain alkanthienyl (Ci-C 8 8) or a straight-chain achenyl (Cn-Cis), and R8a is a straight-chain alkyl (C? 3-C2j), alkenyl (C? 3-C23) or poly (C13-C23) alkenyl.
5. A compound of the formula (1) wherein R4a is C (0) R8a; R4a is C (0) R8a; R8a is (C13-C23) alkyl, (C3-C23) alkenyl or poly (CX3-C23) alkenyl, all of which may be straight or branched chain; X is a straight or branched chain alkyl, alkenyl or polyalkenyl; and the enantiomorphs and structural isomers thereof;
6. The compound according to claim 5, wherein X is (C10-C20) alkyl, (C? 0-C20) alkenyl or (C? 0-C2o) alkenyl poly, all these may be straight or branched chain .
7. The compound according to claim 6, wherein: X is (C10-C20) alkenyl or poly (? O_C2o) alkenyl, all of these may be straight or branched chain.
The compound according to claim 7, wherein: X is a branched-chain (C1-C18) alktrienyl or straight-chain (C11-C15) alkenyl, and R8a is an alkyl (C? 3-C23) , straight alkenyl (C? 3-C23) or poly (Ci3-C23) alkenyl straight chain.
9. A process for preparing sphingosines, sphingosinephosphorylethanolamines and ceramides, comprising the following steps: (ii) raising the mycelium harvest of said fungus, (iii) isolating the sphingolipid of the formula from said mycelium. wherein R 4a is C (0) R 3 - R 8a is (C 13 -C 23) alkyl, alkyl (C 3 -C63) or poly (C 3 3 C23) alkenyl, all these can be straight or branched chain; X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; and (iv) modifying said sphingolipid by selective hydrolysis to form (a) a sphingosine of the: ormula (II) wherein X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; (b) a sphingosine phosphorylethanolamine of the formula (III) wherein X is a straight or branched alkyl, alkenyl or polyalkenyl all; or (c) a ceramide of the formula (IV) wherein Ra is C (0) R8a; R8a is alkyl (C -C-, (C13-C23) alkenyl or poly (C3-C23) alkenyl, all of which may be straight or branched chain, X is a straight chain alkyl, alkyl or polyalkenyl or all the branched, and the enantiomorphs and structural isomers thereof 10. The process according to claim 9, for preparing a sphingosine of the formula (II), a
10. The process according to claim 9, for preparing a sphingosine of the formula (II), a sphingosinephosphorylethanolamine of the formula (II) or a ceramide of the formula (IV), wherein X is alkyl (C? 0-C20) , (C10-C2o) alkenyl or poly (C? 0-C2o) alkenyl, all these may be straight or branched chain; which comprises cultivating an appropriate Oomycete fungus in step (i).
11. The procedure according to the claim 10, for preparing a sphingosine of the formula (II), a sphingosine phosphorylethanolamine of the formula (III) or a ceramide of the formula (IV), wherein X is (C10-C20) alkenyl or (C10-C20) alkenyl poly (C10-C20) alkenyl, all these can be straight or branched chain.
12. The procedure according to the claim 11, to prepare a sphingosine of the formula (II), a sphingosinephosphorylethanolamine of the formula (III) or a ceramide of the formula (IV), wherein X is a branched chain alkanthienyl (Ci-C? 8) or an alkenyl (Cn-C? 5) straight chain, and R8a is a (C13-C23) alkyl, (C? 3-C23) alkenyl or straight-chain poly (C13-C23) alkenyl all.
13. A process for preparing daughter or daughter sphingolipids of the formula V (V) wherein R5 is a hydrogen atom, hydroxyl, mercapto, amino, monosubstituted amino, disubstituted amino or a disubstituted amino in which the two substituents, together with the nitrogen atom, to which they are attached, form a nitrogen atom containing a heterocyclic ring with 3 to 7 members, OC (0) R6 or OR6, or together with the carbon, to which it is attached, forms a group keto R6 is alkyl (d-C?), Alkenyl (C2-C6), (C2-C6) alkynyl, aralkyl or heterocyclylalkyl; Q is any organic group, a substituted phosphate or phosphate, or a substituted phosphonate or phosphonate, and is not necessarily more limited; R3 and R4 are, independently, a hydrogen atom, lower alkyl, C (0) Rs, C (0) 0Rfi or, together, with the nitrogen atom, to which they are attached, form a nitro group or a nitrogen atom containing a heterocyclic ring with 3 to 7 members; R8 is (C1-C23) alkyl, (C2-C23) alkenyl, poly (Ct-C23) alkenyl, (C2-C23) alkynyl, aralkyl or heterocyclylalkyl, which is cyclic, straight or branched chain, and which can be substituted by one or more conventional pharmaceutically acceptable substituents, such as halo, nitro hydroxyl and the like, and the enantiomorphs and structural isomers thereof; comprising the following steps: (i) cultivating an appropriate fungus, (ii) raising the mycelium harvest of said fungus, (iii) isolating said sphingolipid from said mycelium. wherein R4a is C (0) R8a; R8a is (C13-C23) alkyl, (C3-C23) alkenyl or poly (C3-C2) alkenyl, all of which may be straight or branched chain; X is a straight-chain or straight-chain alkyl, alkenyl or polyalkenyl all; (iv) modifying said lipid by selective hydrolysis to form (a) a sphingosine of the formula (II) wherein X is a straight chained or branched alkyl, achanyl or polyalkenyl all; (b) a sphingosine phosphorylethanolamine of the formula (III) wherein X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; or (c) a ceramide of the formula (IV) (IV) wherein R4a is C (0) R8a; wherein R4a is C (0) R8a; R8a is (C13-C23) alkyl, (C3-C23) alkenyl or (C13-C23) alkenyl-poly, all these may be straight or branched chain; X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; and the enantiomorphs and structural isomers thereof; and (v) reacting a sphingosine of the formula (II), a sphingosinephosphorylethanolamine of the formula (III) or a ceramide of the formula (IV) with one or more suitable organic reactants to form the desired sphingolipid child of the formula (V) ).
14. The process according to claim 13, for producing a sphingolipid child of the formula (V), wherein R5 is a hydrogen atom, hydroxyl, mercapto, amino, monosubstituted amino, disubstituted amino, OC (0) R6 or OR6 or together with the carbon, to which it is attached, forms a keto group; R6 is (C6-6) alkyl, (C2-C6) alkenyl, (C2-C6) alkynyl, aralkyl or heterocyclylalkyl, which is cyclic, straight-chain or branched, and which may be substituted by one or more conventional substituents, pharmaceutically acceptable, such as halo, nitro, hydroxyl and the like; Q is a hydrogen atom, hydroxy, mercapto, NRXR2, formyl, alkanoyl, OC (0) R6, OR6, a substituted phosphate or phosphate, a substituted phosphonate or phosphonate, a nucieotide, a nucleoside, a polynucleotide, a polynucleoside, a amino acid, a peptide, a saccharidase or a polysaccharidase; R1 and R2 are, independently, a hydrogen atom, lower alkyl, C (0) R7, C (0) 0R7 or together with the nitrogen atom, to which they are attached, form a nitro group or a nitrogen atom containing a heterocyclic ring with 3 to 7 members; R7 is alkyl, alkenyl, alkynyl, aralkyl or heterocyclylalkyl, which is cyclic, straight or branched chain, and which can be substituted by one or more conventional, pharmaceutically acceptable substituents, such as halo, nitro, hydroxyl and the like; R3 and R4 are, independently, a hydrogen atom, lower alkyl, C (0) R8, C (0) OR8 or together with the nitrogen atom, to which they are attached, form a nitro group or a nitrogen atom containing a ring with 3 to 7 members; R8 is (C? -C23) alkenyl (C2-C23) alkenyl, poly (C4-C23) alkenyl, (C2-C23) alkynyl, aralkyl or heterocyclylalkyl, which is cyclic, straight-chain or
15. The procedure according to the claim 14, to produce a sphingolipid child of formula (V), wherein: Q is selected from the group consisting of hydroxyl, glycyl, arginyl, lysyl, galactosyl, sulfogalactosyl, glucosyl, inositol, lactosyl, trihexosyl, phosphorylcholine, phosphorylethanolamine, GalNAc -Gal-Glc, Gal-Gal-Glc Sia-Gal-Glc, Gal-GalNAc GalNAc I and I Sia-Gal-Glc Sia-Gal-Glc.
16. The procedure according to the claim 15, to produce a sphingolipid child of the formula (V), wherein Q is glucosyl, R8 is CH (OH) - (CH2) nCH3 and n is 11-21.
17. A method comprising contacting a cell with a pharmaceutically effective amount of (i) a compound of the formula (I) (I) wherein R a is C (0) R 8 a; R8a is (C13-C23) alkyl, (C3-C23) alkenyl or poly (C3-C23) alkenyl, all of which may be straight or branched chain; X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; and the enantiomorphs and structural isomers thereof; (ii) a compound of the formula (II) wherein X is a straight or branched chain alkyl, alkemyl or polyalkenyl all; and the enantiomorphs and structural isomers thereof; (iii) a compound of the form (III) wherein X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; and the enantiomorphs and structural isomers thereof; (iv) a compound of the formula (IV) wherein R4a is C (0) Rfla; R8a is (C13-C23) alkyl, (C3-C23) alkenyl or poly (Ci3-C23) alkenyl, all of which may be straight or branched chain; X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; and the enantiomorphs and structural isomers thereof; or (v) a compound of the formula IV) wherein R5 is a hydrogen atom, hydroxyl, mercapto, amino, amino-unsubstituted amino, disubstituted amino or a disubstituted amino in which the two substituents together with the nitrogen atom, to which they are substituted, form a hydrogen atom. nitrogen containing a heterocyclic ring with from 3 to 7 R5 is a hydrogen atom, hydroxyl, mercapto, amino, amino monosubstituted amino, disubstituted amino or a disubstituted amino in which the two substituents together with the nitrogen atom, to which they are attached , they form a nitrogen atom containing a heterocyclic ring with 3 to 7 members, OC (0) R6 or OR6, or together with the carbon, to which it is attached, forms a keto group; R6 is alkyl (C6C6), alkenyl (C2-C6), (C2-C6) alkynyl, aralkyl or heterocyclylalkyl; Q is any organic group, a substituted phosphate or phosphate, or a substituted phosphonate or phosphonate, and is not necessarily more limited; R3 and R4 are, independently, a hydrogen atom, lower alkyl, C (0) R8, C (0) 0R8 or together with the nitrogen atom, to which they are attached, form a nitro group or a nitrogen atom containing a heterocyclic ring with 3 to 7 members; R8 is (C? -C23) alkyl, (C2-C23) alkenyl, poly (C-C23) alkenyl, (C2-C23) alkynyl, aralkyl or heterocyclylalkyl, which is cyclic, straight or branched chain, and which can be substituted with one or more conventional, pharmaceutically acceptable substituents, such as halo, nitro, hydroxyl and the like; and the enantiomorphs and structural isomers thereof; wherein R4a is C (0) RR "; R8a is (C ?3-C23) alkyl, (C13-C23) alkenyl or poly (Ca3-C23) alkenyl, all of which may be straight or branched chain; a straight or branched chain alkyl, alkenyl or polyalkenyl all, and the enantiomorphs and structural isomers thereof, (ii) a compound of the formula (II) wherein X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; and the enantiomorphs and structural isomers thereof; (iii) a compound of the formula (III) wherein X is a straight chain or branched alkyl, alkenyl c-polyalkenyl all; and the enantiomorphs and structural isomers thereof; (iv) a compound of the formula (IV) wherein Ra is C (0) R8a; R8a is (C ?3-C23) alkyl, (C13-C23) alkenyl or poly (Ca3-C23) alkenyl, all of which may be straight or branched chain: X is a straight or branched chain alkyl, alkenyl or polyalkenyl all; and the enantiomorphs and structural isomers thereof; or (v) a compound of the formula (V) (V) wherein R5 is a hydrogen atom, hydroxyl, mercapto, amino, monosubstituted amino, disubstituted amino or a disubstituted amino in which the two substituents together with the nitrogen atom, to which they are attached, form a nitrogen atom containing a heterocyclic ring with 3 to 7 members, OC (0) R6 or OR6, or together with the carbon, to which it is attached, forms a keto group; R6 is alkyl (C6C6), alkenyl (C2-C6), (C2-C6) alkynyl, aralkyl or heterocyclylalkyl; Q is any organic group, a substituted phosphate or phosphate, or a substituted phosphonate or phosphonate, and is not necessarily more limited; R3 and R4 are, independently, a hydrogen atom, lower alkyl, C (0) R8, C (0) 0R8 or together with the nitrogen atom, to which they are attached, form a nitro group or a nitrogen atom containing a heterocyclic ring with 3 to 7 members; R8 is (C?-C23) alkyl, (C2-C23) alkenyl, (C4-C23) alkenyl (C2-C23) alkynyl, aralkyl or heterocyclylalkyl, which is cyclic, straight or branched chain, and which could be substituted by one or more conventional pharmaceutically acceptable substituents, such as halo, nitro, hydroxyl and the like, and the enantiomorphs and structural isomers thereof; in the presence of an agronomically acceptable carrier to provide a protective effect against pathogenic microorganisms in the plant.
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