BIOSYNTHESIS OF HETEROCYCLES BIOSYNTHESIS OF HETEROCYCLES From Isolation to Gene Cluster PATRIZIADIANA GIROLAMOCIRRINCIONE DipartimentodiScienzeeTecnologieBiologicheChimichee Farmaceutiche(STEBICEF)UniversitàdegliStudidiPalermo Copyright©2015byJohnWiley&Sons,Inc.Allrightsreserved. PublishedbyJohnWiley&Sons,Inc.,Hoboken,NewJersey PublishedsimultaneouslyinCanada Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmittedinanyformor byanymeans,electronic,mechanical,photocopying,recording,scanning,orotherwise,exceptas permittedunderSection107or108ofthe1976UnitedStatesCopyrightAct,withouteithertheprior writtenpermissionofthePublisher,orauthorizationthroughpaymentoftheappropriateper-copyfeeto theCopyrightClearanceCenter,Inc.,222RosewoodDrive,Danvers,MA01923,(978)750-8400,fax (978)750-4470,oronthewebatwww.copyright.com.RequeststothePublisherforpermissionshould beaddressedtothePermissionsDepartment,JohnWiley&Sons,Inc.,111RiverStreet,Hoboken,NJ 07030,(201)748-6011,fax(201)748-6008,oronlineathttp://www.wiley.com/go/permissions. LimitofLiability/DisclaimerofWarranty:Whilethepublisherandauthorhaveusedtheirbesteffortsin preparingthisbook,theymakenorepresentationsorwarrantieswithrespecttotheaccuracyor completenessofthecontentsofthisbookandspecificallydisclaimanyimpliedwarrantiesof merchantabilityorfitnessforaparticularpurpose.Nowarrantymaybecreatedorextendedbysales representativesorwrittensalesmaterials.Theadviceandstrategiescontainedhereinmaynotbesuitable foryoursituation.Youshouldconsultwithaprofessionalwhereappropriate.Neitherthepublishernor authorshallbeliableforanylossofprofitoranyothercommercialdamages,includingbutnotlimitedto special,incidental,consequential,orotherdamages. Forgeneralinformationonourotherproductsandservicesorfortechnicalsupport,pleasecontactour CustomerCareDepartmentwithintheUnitedStatesat(800)762-2974,outsidetheUnitedStatesat (317)572-3993orfax(317)572-4002. Wileyalsopublishesitsbooksinavarietyofelectronicformats.Somecontentthatappearsinprintmay notbeavailableinelectronicformats.FormoreinformationaboutWileyproducts,visitourwebsiteat www.wiley.com. LibraryofCongressCataloging-in-PublicationData: Diana,Patrizia. Biosynthesisofheterocycles:fromtheisolationtogenecluster/PatriziaDiana,GirolamoCirrincione. pagescm “AJohnWiley&Sons,Inc.,publication.” Includesbibliographicalreferencesandindex. ISBN978-1-118-02867-4(cloth) 1.Heterocycliccompounds–Synthesis.2.Biosynthesis.I.Cirrincione,Girolamo.II.Title. QD400.5.S95D532015 547’.59–dc23 2014023088 Typesetin10/12ptTimesLTStdbyLaserwordsPrivateLimited,Chennai,India PrintedintheUnitedStatesofAmerica 10987654321 1 2015 ToGabriella,Giovanni,andlittleVincenzo. CONTENTS PREFACE xiii ACKNOWLEDGMENTS xv 1 Introduction 1 1.1 NaturalProducts:PrimaryandSecondaryMetabolites, 4 1.2 CommonReactionsinSecondaryMetabolites, 6 1.2.1 Alkylations, 6 1.2.2 Wagner–MeerweinRearrangements, 16 1.2.3 AldolandClaisenReactions, 17 1.2.4 SchiffBaseFormationandMannichReactions, 23 1.2.5 Transaminations, 25 1.2.6 Decarboxylations, 26 1.2.7 OxidationandReductionReactions, 31 1.2.8 Dehalogenation/HalogenationReactions, 39 1.2.9 GlycosylationReactions, 46 References, 48 2 TechniquesforBiosynthesis 51 2.1 IsotopicLabeling, 52 2.1.1 StableIsotopes, 52 2.1.2 RadioactiveIsotopes, 61 2.2 GeneCodingforEnzymes, 62 2.3 CombinatorialBiosynthesis, 63 References, 70 vii viii CONTENTS 3 Three-MemberedHeterocyclicRingsandTheirFusedDerivatives 73 3.1 AziridinesandAzirines, 73 3.1.1 Azicemicins, 73 3.1.2 Miraziridine, 74 3.1.3 Maduropeptin, 75 3.1.4 Azinomycins, 79 3.1.5 Ficellomycin, 87 3.1.6 Mitomycins, 89 3.1.7 AzirinomycinandRelatedAzirines, 101 3.2 OxiranesandOxirenes, 104 3.2.1 Fosfomycin, 104 3.2.2 AK,HC,andAFtoxins, 111 3.2.3 Cerulenin, 117 3.2.4 Polyhydroxyalkanoates, 118 3.2.5 Epoxyrollins, 118 3.2.6 Asperlactone,Aspyrone,Asperline, 121 3.2.7 Tajixanthone, 129 3.2.8 Cyclomarin, 133 3.2.9 Cyclopenin, 139 3.2.10 OvalicinandFumagillin, 141 3.2.11 MethylenomycinA, 143 3.2.12 AntibioticLL-C10037, 147 3.2.13 Manumycins, 151 3.2.14 Scopolamine, 164 3.2.15 IridoidGlucosides, 169 3.2.16 Cordiaquinone, 172 3.2.17 CyclizidineandIndolizomycin, 172 3.2.18 EnediyneAntibiotics, 175 3.2.19 Macrolides, 195 3.2.20 Epothilones, 225 3.2.21 Pimaricin, 233 3.2.22 Hypothemycin, 240 3.2.23 RadicicolandMonocillinI, 243 3.2.24 Trichothecenes, 248 3.2.25 SporolidesAandB, 255 References, 258 4 Four-MemberedHeterocyclicRingsandTheirFusedDerivatives 277 4.1 AzetidineandAzetines, 277 4.1.1 Azetidine-2-carboxylicacid, 277 4.1.2 Polyoxins, 280 4.1.3 MugineicAcids, 288 4.1.4 TabtoxinandTabtoxinine-β-lactam, 293