Morpholine Catalyzed One-pot Multicomponent Synthesis of Compounds Containing Chromene Core in Water.pdfVIP
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Morpholine Catalyzed One-pot Multicomponent Synthesis of Compounds Containing Chromene Core in Water.pdf
FULLPAPER
MorpholineCatalyzedOne—potMulticomponentSynthesisof
CompoundsContainingChromeneCoreinWater
Heravi,MajidM., Zakeri,Masoumeh。 Mohammadi,Narges。
DepartmentofChemist~,SchoolofSciences,AlzahraUniversity,Vanak,Tehran,Iran
6YoungResearchersClub IslamicAzadUniversity,NorthTehra Bra ch,Tehra,z,Ira,z
,
A seriesofdihydropyrano[c]chromenewasobtainedvia condensation ofaldehyde,malononitrileand
4-hydroxycoumarininwatercatalyzedbymorpholine,asaone—potreaction
. Thesignificanceofourfindingsrelates
toreducingtheuseoforganicsolvents,potentiallytoxicandhazardousmaterials, aswellasitssimplicity,good
yields,mildconditions,andlowercosts.
Keywords organocatalysis,dihydropyrano[c]chromene,morpholine,multicomponent
lntroduction Smallorgna icmoleculeslikemorpholine,L.proline,
and itsderivativesraereadily commercially available
Green chemistryisaquickly developingnew field
catalystsandhavebeenusedinvarioustrna sformations
thatprovidesusaproactivepath forthe sustainable
with excellentyields. Morerecently.morpholine.a
progressof future science and technologies. Green
cheapandfacileweakbase(pKb=5.51),hasbeenused
chemistry useshighly efficientand environmentally
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