Annual Volumes 75-79
Annual Volume 75
- (R,R)-N,N'-BIS(3,5-DI-TERT-BUTYLSALICYLIDENE)-1,2-CYCLOHEXANEDIAMINO MANGANESE(III) CHLORIDE, A HIGHLY ENANTIOSELECTIVE EPOXIDATION CATALYST
- CATALYTIC ASYMMETRIC ALLYLATION REACTIONS: (S)-1-(PHENYLMETHOXY)-4-PENTEN-2-OL
- ASYMMETRIC SYNTHESIS OF DIETHYL (R)-(−)-(1-AMINO-3-METHYLBUTYL)PHOSPHONATE
- ETHYL (R)-2-AZIDOPROPIONATE
- ETHYL GLYCIDATE FROM (S)-SERINE: ETHYL (R)-(+)-2,3-EPOXYPROPANOATE
- (4R,5S)-4,5-DIPHENYL-3-VINYL-2-OXAZOLIDINONE
- SYNTHESIS OF UNSYMMETRICAL BIARYLS USING A MODIFIED SUZUKI CROSS-COUPLING: 4-BIPHENYLCARBOXALDEHYDE
- ACCELERATED SUZUKI COUPLING VIA A LIGANDLESS PALLADIUM CATALYST: 4-METHOXY-2'-METHYLBIPHENYL
- 2-(4-METHOXYPHENYL)-2-CYCLOHEXEN-1-ONE: PREPARATION OF 2-IODO-2-CYCLOHEXEN-1-ONE AND SUZUKI COUPLING WITH 4-METHOXYPHENYLBORONIC ACID
- SYNTHESIS OF CHIRAL (E)-CROTYLSILANES: [3R- AND 3S-]-(4E)-METHYL 3-(DIMETHYLPHENYLSILYL)-4-HEXENOATE
- 3-CHLORO-2-(CHLOROMETHYL)-1-PROPENE
- [1.1.1]PROPELLANE
- N-BENZYL-2,3-AZETIDINEDIONE
- SYNTHESIS OF β-LACTONES BY ALDOLIZATION OF KETONES WITH PHENYL ESTER ENOLATES: 3,3-DIMETHYL-1-OXASPIRO[3.5]NONAN-2-ONE
- EFFICIENT SYNTHESIS OF BROMIDES FROM CARBOXYLIC ACIDS CONTAINING A SENSITIVE FUNCTIONAL GROUP: DEC-9-ENYL BROMIDE FROM 10-UNDECENOIC ACID
- SYNTHESIS OF 4-(2-BROMO-2-PROPENYL)-4-METHYL-γ-BUTYROLACTONE BY THE REACTION OF ETHYL LEVULINATE WITH (2-BROMOALLYL)DIISOPROPOXYBORANE PREPARED BY HALOBORATION OF ALLENE
- PHOTOINDUCED-ADDITION OF METHANOL TO (5S)-(5-O-TERT-BUTYLDIMETHYLSILOXYMETHYL)FURAN-2(5H)-ONE: (4R,5S)-4-HYDROXYMETHYL-(5-O-TERT-BUTYLDIMETHYLSILOXYMETHYL)FURAN-2(5H)-ONE
- PREPARATION OF CYANOALKYNES: 3-PHENYL-2-PROPYNENITRILE
- WITTIG OLEFINATION OF PERFLUOROALKYL CARBOXYLIC ESTERS; SYNTHESIS OF 1,1,1-TRIFLUORO-2-ETHOXY-5-PHENYLPENT-2-ENE AND 1-PERFLUOROALKYL EPOXY ETHERS: 1,1,1-TRIFLUORO-2-ETHOXY-2,3-EPOXY-5-PHENYLPENTANE
- 2-TRIMETHYLSILYLETHANESULFONYL CHLORIDE (SES-CL)
- (1'S,2'S)-METHYL-3O,4O-(1',2'-DIMETHOXYCYCLOHEXANE-1',2'-DIYL)-α-D-MANNOPYRANOSIDE
- SELECTIVE PROTECTION OF 1,3-DIOLS AT THE MORE HINDERED HYDROXY GROUP: 3-(METHOXYMETHOXY)-1-BUTANOL
- 4-DIMETHYLAMINO-N-TRIPHENYLMETHYLPYRIDINIUM CHLORIDE
- 6,7-DIHYDROCYCLOPENTA-1,3-DIOXIN-5(4H)-ONE
- 3-CYCLOPENTENE-1-CARBOXYLIC ACID
- USE OF 1,2,4,5-TETRABROMOBENZENE AS A 1,4-BENZADIYNE EQUIVALENT: ANTI- AND SYN-1,4,5,8-TETRAHYDROANTHRACENE 1,4:5,8-DIEPOXIDES
- SYNTHESIS OF 8,8-DICYANOHEPTAFULVENE FROM CYCLOHEPTATRIENYLIUM TETRAFLUOROBORATE AND BROMOMALONONITRILE
- N-VINYLPYRROLIDIN-2-ONE AS A 3-AMINOPROPYL CARBANION EQUIVALENT IN THE SYNTHESIS OF SUBSTITUTED 1-PYRROLINES: 2-PHENYL-1-PYRROLINE
- SYNTHESIS OF CIS-4A(S),8A(R)-PERHYDRO-6(2H)-ISOQUINOLINONES FROM QUININE: 4A(S), 8A(R)-2-BENZOYLOCTAHYDRO-6(2H)-ISOQUINOLINONE
Annual Volume 76
- RESOLUTION OF 1,1'-BI-2-NAPHTHOL
- (R)-(+)- AND (S)-(−)-2,2'-BIS(DIPHENYLPHOSPHINO)-1,1'-BINAPHTHYL (BINAP)
- (4R,5R)-2,2-DIMETHYL-α,α,α',α'-TETRA(NAPHTH-2-YL)-1,3-DIOXOLANE-4,5-DIMETHANOL FROM DIMETHYL TARTRATE AND 2-NAPHTHYL-MAGNESIUM BROMIDE
- (R,R)- AND (S,S)-N,N'-DIMETHYL-1,2-DIPHENYLETHYLENE-1,2-DIAMINE
- 1S-(−)-1,3-DITHIANE 1-OXIDE
- (1S,2R)-1-AMINOINDAN-2-OL
- ASYMMETRIC SYNTHESIS OF α-AMINO ACIDS BY THE ALKYLATION OF PSEUDOEPHEDRINE GLYCINAMIDE: L-ALLYLGLYCINE AND N-BOC-L-ALLYLGLYCINE
- 1-CHLORO-(2S,3S)-DIHYDROXYCYCLOHEXA-4,6-DIENE
- (2S,3S)-(+)-(3-PHENYLCYCLOPROPYL)METHANOL
- SYNTHESIS OF CHIRAL NON-RACEMIC DIOLS FROM (S,S)-1,2,3,4-DIEPOXYBUTANE: (2S,3S)-DIHYDROXY-1,4-DIPHENYLBUTANE
- PREPARATION OF ENANTIOMERICALLY PURE α-N,N-DIBENZYLAMINO ALDEHYDES: S-2-(N,N-DIBENZYLAMINO)-3-PHENYLPROPANAL
- METHYL (S)-2-PHTHALIMIDO-4-OXOBUTANOATE
- CONVERSION OF NITRILES INTO TERTIARY AMINES: N,N-DIMETHYLHOMOVERATRYLAMINE
- ETHYL 5-CHLORO-3-PHENYLINDOLE-2-CARBOXYLATE
- GENERATION AND USE OF LITHIUM PENTAFLUOROPROPEN-2-OLATE: 4-HYDROXY-1,1,1,3,3-PENTAFLUORO-2-HEXANONE HYDRATE
- BROMOFLUORINATION OF ALKENES: 1-BROMO-2-FLUORO-2-PHENYLPROPANE
- MONO-C-METHYLATION OF ARYLACETONITRILES AND METHYL ARYLACETATES BY DIMETHYL CARBONATE: A GENERAL METHOD FOR THE SYNTHESIS OF PURE 2-ARYLPROPIONIC ACIDS. 2-PHENYLPROPIONIC ACID
- (TERT-BUTYLDIMETHYLSILYL)ALLENE
- DIMETHYL SQUARATE AND ITS CONVERSION TO 3-ETHENYL-4-METHOXYCYCLOBUTENE-1,2-DIONE AND 2-BUTYL-6-ETHENYL-5-METHOXY-1,4-BENZOQUINONE
- [3 + 4] ANNULATION USING A [β-(TRIMETHYLSILYL)ACRYLOYL]SILANE AND THE LITHIUM ENOLATE OF AN α,β-UNSATURATED METHYL KETONE: (1R,6S,7S)-4-(TERT-BUTYLDIMETHYLSILOXY)-6-(TRIMETHYLSILYL)BICYCLO[5.4.0]UNDEC-4-EN-2-ONE
- GENERATION OF 1-PROPYNYLLITHIUM FROM (Z/E)-1-BROMO-1-PROPENE: 6-PHENYLHEX-2-YN-5-EN-4-OL
- 6-CHLORO-1-HEXENE AND 8-CHLORO-1-OCTENE
- USE OFCERIUM(III) CHLORIDE IN THE REACTIONS OF CARBONYL COMPOUNDS WITH ORGANOLITHIUMS OR GRIGNARD REAGENTS FOR THE SUPPRESSION OF ABNORMAL REACTIONS:1-BUTYL-1,2,3,4-TETRAHYDRO-1-NAPHTHOL
- REGIOSELECTIVE MONOALKYLATION OF KETONES VIA THEIR MANGANESE ENOLATES: 2-BENZYL-6-METHYLCYCLOHEXANONE FROM 2-METHYLCYCLOHEXANONE
- COPPER-CATALYZED CONJUGATE ADDITION OF FUNCTIONALIZED ORGANOZINC REAGENTS TO α,β-UNSATURATED KETONES: ETHYL 5-(3-OXOCYCLOHEXYL)PENTANOATE
- ISOMERIZATION OF β-ALKYNYL ALLYLIC ALCOHOLS TO FURANS CATALYZED BY SILVER NITRATE ON SILICA GEL: 2-PENTYL-3-METHYL-5-HEPTYLFURAN
- 2-CHLOROPHENYL PHOSPHORODICHLORIDOTHIOATE
- VITAMIN D2 FROM ERGOSTEROL
- 5-PHENYLDIPYRROMETHANE AND 5,15-DIPHENYLPORPHYRIN
- 9,10-DIPHENYLPHENANTHRENE
Annual Volume 77
- PREPARATION OF (R,R)-1,2:4,5-DIEPOXYPENTANE
- PREPARATION OF [R-(R,S)]-β-METHYL-α-PHENYL-1-PYRROLIDINEETHANOL
- SYNTHESIS AND DIASTEREOSELECTIVE ALKYLATION OF PSEUDOEPHEDRINE AMIDES
- TRANSFORMATION OF PSEUDOEPHEDRINE AMIDES INTO HIGHLY ENANTIOMERICALLY ENRICHED ALDEHYDES, ALCOHOLS, AND KETONES
- (R)-(+)-2-HYDROXY-1,2,2-TRIPHENYLETHYL ACETATE
- SULFINIMINES (THIOOXIMINE S-OXIDES): ASYMMETRIC SYNTHESIS OF METHYL (R)-(+)-β-PHENYLALANATE FROM (S)-(+)-N-(BENZYLIDENE)-P-TOLUENESULFINAMIDE
- SYNTHESIS OF 1,1-DIMETHYLETHYL (S)-4-FORMYL-2,2-DIMETHYL-3-OXAZOLIDINECARBOXYLATE BY OXIDATION OF THE ALCOHOL
- DIASTEREOSELECTIVE SYNTHESIS OF PROTECTED VICINAL AMINO ALCOHOLS: (S)-2-[(4S)-N-TERT-BUTOXYCARBONYL-2,2-DIMETHYL-1,3-OXAZOLIDINYL]-2-TERT-BUTYLDIMETHYLSILOXYETHANAL FROM A SERINE-DERIVED ALDEHYDE
- O4,O5-ISOPROPYLIDENE-1,2:3,6-DIANHYDRO-D-GLUCITOL FROM ISOSORBIDE
- SYNTHESIS OF (S,E)-1-(METHOXYMETHOXY)-1-TRIBUTYLSTANNYL-2-BUTENE
- ALLYLINDATION IN AQUEOUS MEDIA: METHYL 3-(HYDROXYMETHYL)-4-METHYL-2-METHYLENEPENTANOATE
- THE SYNTHESIS OF 2-ALKYL-4-PYRONES FROM MELDRUM'S ACID
- 7α-ACETOXY-(1Hβ, 6Hβ)-BICYCLO[4.4.1]UNDECA-2,4,8-TRIENE VIA CHROMIUM-MEDIATED HIGHER ORDER CYCLOADDITION
- STILLE COUPLINGS CATALYZED BY PALLADIUM-ON-CARBON WITH CUI AS A COCATALYST: SYNTHESIS OF 2-(4'-ACETYLPHENYL)THIOPHENETHE ORIGINAL REPORT WAS PUBLISHED ELSEWHERE: ROTH, G. P.; FARINA, V.; LIEBESKIND, L. S.; PEñA-CABRERA, E. TETRAHEDRON LETT. 1995, 36, 2191.
- THE DESS-MARTIN PERIODINANE: 1,1,1-TRIACETOXY-1,1-DIHYDRO-1,2-BENZIODOXOL-3(1H)-ONE
- 9-ETHYL-3,6-DIMETHYLCARBAZOLE (DMECZ)
- SYNTHESIS OF 2'-DEOXYRIBONUCLEOSIDES: β-3',5'-DI-O-BENZOYLTHYMIDINE
- BIS(PINACOLATO)DIBORON
- β-MERCAPTOPROPIONITRILE (2-CYANOETHANETHIOL)
- α-TOSYLBENZYL ISOCYANIDE
- PREPARATION OF BIS(2,4,6-TRIMETHYLPYRIDINE)IODINE(I) HEXAFLUOROPHOSPHATE AND BIS(2,4,6-TRIMETHYLPYRIDINE) BROMINE(I) HEXAFLUOROPHOSPHATE
- METHYL 2,3-O-(6,6'-OCTAHYDRO-6,6'-BI-2H-PYRAN-2,2'-DIYL)-α-D-GALACTOPYRANOSIDE
- 6A-O-P-TOLUENESULFONYL-β-CYCLODEXTRIN
- 6A-O-P-TOLUENESULFONYL-β-CYCLODEXTRIN
- CYCLOPROPYLACETYLENE
- 3-NITROPROPANAL, 3-NITROPROPANOL, AND 3-NITROPROPANAL DIMETHYL ACETAL
- PHOTOCHEMICAL SYNTHESIS OF BICYCLO[1.1.1]PENTANE-1,3-DICARBOXYLIC ACID
- CYCLOPROPENE: A NEW SIMPLE SYNTHESIS AND ITS DIELS-ALDER REACTION WITH CYCLOPENTADIENE
Annual Volume 78
- (R)-2-DIPHENYLPHOSPHINO-2'-METHOXY-1,1'-BINAPHTHYL
- CATALYTIC ASYMMETRIC SYNTHESIS OF NITROALDOLS USING A LANTHANUM-LITHIUM-BINOL COMPLEX:(2S,3S)-2-NITRO-5-PHENYL-1,3-PENTANEDIOL
- PALLADIUM-CATALYZED AMINATION OF ARYL HALIDES AND ARYL TRIFLATES: N-HEXYL-2-METHYL-4-METHOXYANILINE AND N-METHYL-N-(4-CHLOROPHENYL)ANILINE
- INDOLE SYNTHESIS BY PD-CATALYZED ANNULATION OF KETONES WITH O-IODOANILINE: 1,2,3,4-TETRAHYDROCARBAZOLE
- NICKEL-CATALYZED COUPLING OF ARYL O-CARBAMATES WITH GRIGNARD REAGENTS: 2,7-DIMETHYLNAPHTHALENE
- SYNTHESIS OF 4-, 5-, AND 6-METHYL-2,2'-BIPYRIDINE BY A NEGISHI CROSS-COUPLING STRATEGY: 5-METHYL-2,2'-BIPYRIDINE
- ULLMAN METHOXYLATION IN THE PRESENCE OF A 2,5-DIMETHYLPYRROLE-BLOCKED ANILINE: PREPARATION OF 2-FLUORO-4-METHOXYANILINE
- 1,4,7,10-TETRAAZACYCLODODECANE
- EFFICIENT SYNTHESIS OF HALOMETHYL-2,2'-BIPYRIDINES: 4,4'-BIS(CHLOROMETHYL)-2,2'-BIPYRIDINE
- PREPARATION AND USE OF N,N'-DI-BOC-N"-TRIFLYLGUANIDINE
- REDUCTION OF SULFONYL HALIDES WITH ZINC POWDER: S-METHYL METHANETHIOSULFONATE
- (PHENYL)[2-(TRIMETHYLSILYL)PHENYL]IODONIUM TRIFLATE. AN EFFICIENT AND MILD BENZYNE PRECURSOR
- 4-HYDROXY[1-13C]BENZOIC ACID
- (1'R)-(−)-2,4-O-ETHYLIDENE-D-ERYTHROSE AND ETHYL (E)-(−)-4,6-O-ETHYLIDENE-(4S,5R,1'R)-4,5,6-TRIHYDROXY-2-HEXENOATE
- SYNTHESIS OF PENTA-1,2-DIEN-4-ONE (ACETYLALLENE)
- BICYCLOPROPYLIDENE
- PREPARATION OF (E)-1-DIMETHYLAMINO-3-TERT-BUTYLDIMETHYLSILOXY-1,3-BUTADIENE
- [4+2] CYCLOADDITION OF 1-DIMETHYLAMINO-3-TERT-BUTYLDIMETHYLSILOXY-1,3-BUTADIENE WITH METHYL ACRYLATE: 4-HYDROXYMETHYL-2-CYCLOHEXEN-1-ONE
- DIETHYL [(PHENYLSULFONYL)METHYL]PHOSPHONATE
- SYNTHESIS OF (−)-(E,S)-3-(BENZYLOXY)-1-BUTENYL PHENYL SULFONE VIA A HORNER-WADSWORTH-EMMONS REACTION OF (−)-(S)-2-(BENZYLOXY)PROPANAL
- (+)-(1R,2S,3R)-TETRACARBONYL[(1-3η)-1-(PHENYLSULFONYL)- BUT-2-EN-1-YL]IRON(1+) TETRAFLUOROBORATE
- PREPARATION AND DIELS-ALDER REACTION OF A 2-AMIDO SUBSTITUTED FURAN: TERT-BUTYL 3A-METHYL-5-OXO-2,3,3A,4,5,6-HEXAHYDROINDOLE-1-CARBOXYLATE
- [4 + 3] CYCLOADDITION OF AMINOALLYL CATIONS WITH 1,3-DIENES: 11-OXATRICYCLO[4.3.1.12,5]UNDEC-3-EN-10-ONE
- SYNTHESIS OF AMINO ACID ESTER ISOCYANATES: METHYL (S)-2-ISOCYANATO-3-PHENYLPROPANOATE
- IN SITU CATALYTIC EPOXIDATION OF OLEFINS WITH TETRAHYDROTHIOPYRAN-4-ONE AND OXONE: TRANS-2-METHYL-2,3-DIPHENYLOXIRANE
- METHYL CARBAMATE FORMATION VIA MODIFIED HOFMANN REARRANGEMENT REACTIONS: METHYL N-(P-METHOXYPHENYL)CARBAMATE
- TRIBUTYLSTANNANE (BU3SNH)-CATALYZED BARTON-MCCOMBIE DEOXYGENATION OF ALCOHOLS: 3-DEOXY-1,2:5,6-BIS-O-(1-METHYLETHYLIDENE)-α-D-RIBO-HEXOFURANOSE
- 2-(3-OXOBUTYL)CYCLOPENTANONE-2-CARBOXYLIC ACID ETHYL ESTER
- 1-OXO-2-CYCLOHEXENYL-2-CARBONITRILE
Annual Volume 79
- SYNTHESIS OF TRIS(2-PERFLUOROHEXYLETHYL)TIN HYDRIDE: A HIGHLY FLUORINATED TIN HYDRIDE WITH ADVANTAGEOUS FEATURES OF EASY PURIFICATION
- 1,2-METALLATE REARRANGEMENT: (Z)-4-(2-PROPENYL)-3-OCTEN-1-OL
- DIMETHYLTITANOCENE
- MOLYBDENUM CARBONYL-CATALYZED ALKYNOL CYCLOISOMERIZATION: PREPARATION OF 2-PHENYL-2,3-DIHYDROFURAN
- ETHYL 3-(P-CYANOPHENYL)PROPIONATE FROM ETHYL 3-IODOPROPIONATE AND P-CYANOPHENYLZINC BROMIDE
- PREPARATION OF N-BUTYL 4-CHLOROPHENYL SULFIDE
- SYNTHESIS OF SYMMETRICAL TRANS -STILBENES BY A DOUBLE HECK REACTION OF (ARYLAZO)AMINES WITH VINYLTRIETHOXYSILANE: TRANS-4,4'-DIBROMOSTILBENE
- SYNTHESIS AND UTILIZATION OF INDIUM (I) IODIDE FOR IN SITU FORMATION OF ENANTIOENRICHED ALLENYLINDIUM REAGENTS AND THEIR ADDITION TO ALDEHYDES: (2R,3S,4S)-1-(TERT-BUTYLDIPHENYLSILYLOXY)-2,4-DIMETHYL-5-HEXYN-3-OL
- ASYMMETRIC SYNTHESIS OF (M)-2-HYDROXYMETHYL-1-(2-HYDROXY-4,6-DIMETHYLPHENYL)NAPHTHALENE VIA A CONFIGURATIONALLY UNSTABLE BIARYL LACTONE
- (R)-3-PHENYLCYCLOHEXANONE
- SYNTHESIS OF (+)-(1S,2R)- AND (−)-(1R,2S)-TRANS-2-PHENYLCYCLOHEXANOL VIA SHARPLESS ASYMMETRIC DIHYDROXYLATION (AD)
- DICYCLOHEXYLBORON TRIFLUOROMETHANESULFONATE
- 2-(N-BENZYL-N-MESITYLENESULFONYL)AMINO-1-PHENYL-1-PROPYL PROPIONATE
- ANTI-SELECTIVE BORON-MEDIATED ASYMMETRIC ALDOL REACTION OF CARBOXYLIC ESTERS: SYNTHESIS OF (2S, 3R)-2,4-DIMETHYL-1,3-PENTANEDIOL
- CAMPHORQUINONE AND CAMPHORQUINONE MONOXIME
- (2S)-(−)-3-EXO-(DIMETHYLAMINO)ISOBORNEOL [(2S)-(−)-DAIB]
- CATALYTIC ENANTIOSELECTIVE ADDITION OF DIALKYLZINCS TO ALDEHYDES USING (2S)-(−)-3-EXO-(DIMETHYLAMINO)ISOBORNEOL [(2S)-DAIB]: (S)-1-PHENYL-1-PROPANOL
- FORMATION OF γ-KETO ESTERS FROM β-KETO ESTERS: METHYL 5,5-DIMETHYL-4-OXOHEXANOATE
- (S)-3-(TERT-BUTYLOXYCARBONYLAMINO)-4-PHENYLBUTANOIC ACID
- PHOTO-INDUCED RING EXPANSION OF 1-TRIISOPROPYLSILYLOXY-1-AZIDOCYCLOHEXANE: PREPARATION OF ε-CAPROLACTAM
- (3,4,5-TRIFLUOROPHENYL)BORONIC ACID-CATALYZED AMIDE FORMATION FROM CARBOXYLIC ACIDS AND AMINES: N-BENZYL-4-PHENYLBUTYRAMIDE
- PREPARATION OF SECONDARY AMINES FROM PRIMARY AMINES VIA 2-NITROBENZENESULFONAMIDES: N-(4-METHOXYBENZYL)-3-PHENYLPROPYLAMINE
- 2-AMINO-3-FLUOROBENZOIC ACID
- 3-(4-BROMOBENZOYL)PROPANOIC ACID
- NUCLEOPHILIC AROMATIC SUBSTITUTION OF ARYL FLUORIDES BY SECONDARY NITRILES: PREPARATION OF 2-(2-METHOXYPHENYL)-2-METHYLPROPIONITRILE
- PREPARATION OF 1-[N-BENZYLOXYCARBONYL-(1S)-1-AMINO-2-OXOETHYL]-4-METHYL-2,6,7-TRIOXABICYCLO[2.2.2]OCTANE
- N-HYDROXY-4-(P-CHLOROPHENYL)THIAZOLE-2(3H)-THIONE
- PREPARATION OF 1-BUTYL-3-METHYL IMIDAZOLIUM-BASED ROOM TEMPERATURE IONIC LIQUIDS
- 4-METHOXYCARBONYL-2-METHYL-1,3-OXAZOLE
- [4+3] CYCLOADDITION IN WATER. SYNTHESIS OF 2,4-ENDO,ENDO-DIMETHYL-8-OXABICYCLO[3.2.1]OCT-6-EN-3-ONE