در هنگام جستجو کلمه در قسمت عنوان میتوانید کلمات مورد جستجو را با کاراکتر (-) جدا کنید.
کاربرد نوع شرط:
- جایگاه : پژوهشی
- مجله: Iranian Journal of Catalysis
- نوع مقاله: Journal Article
- کلمات کلیدی: Organocatalyst,Arylaldehyde,Dimedone (5,Trityl chloride (Ph3CCl),Trityl carbocation,5-dimethyl-1,3-cyclohexanedione),9-Aryl-1,8-dioxo-octahydroxanthene
- چکیده:
- چکیده انگلیسی: Organocatalyst trityl chloride (Ph3CCl), by in situ formation of trityl carbocation with inherent instability, efficiently catalyzes the condensation of dimedone (5,5-dimethyl-1,3-cyclohexanedione) (2 equiv.) with arylaldehydes (1 equiv.) under solvent-free conditions to afford 9-aryl-1,8-dioxo-octahydroxanthenes in high to excellent yields and in relatively short reaction times. Formation of the carbocationic system is confirmed by studying IR, 1H NMR and UV spectra according to the literature. Moreover, a plausible mechanism based on the literature and observations is proposed for the reaction.
- انتشار مقاله: 28-01-1392
- نویسندگان: Abdolkarim Zare,Maria Merajoddin,Mohammad Ali Zolfigol
- مشاهده
- جایگاه : پژوهشی
- مجله: Iranian Journal of Catalysis
- نوع مقاله: Journal Article
- کلمات کلیدی: 2-naphthol,Brønsted acidic ionic liquid,Triethylamine-bonded sulfonic acid {[Et3N-SO3H]Cl},12-Aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-one,Arylaldehyde,Dimedone (5,5-dimethylcyclohexane-1,3-dione)
- چکیده:
- چکیده انگلیسی: Brønsted acidic ionic liquid triethylamine-bonded sulfonic acid {[Et3N-SO3H]Cl} efficiently catalyzes the one-pot multi-component condensation of 2-naphthol with arylaldehydes and dimedone (5,5-dimethylcyclohexane-1,3-dione) under solvent-free conditions to afford 12-aryl-8,9,10,12-tetrahydrobenzo[a]xanthen-11-ones in high yields and relatively short reaction times.
- انتشار مقاله: 17-03-1391
- نویسندگان: Abdolkarim Zare,Roghayyeh Khanivar,Maria Merajoddin,Masoud Kazem-Rostami,Mohammad Mahdi Ahmad-Zadeh,Ahmad Reza Moosavi-Zare,Alireza Hasaninejad
- مشاهده
- جایگاه : پژوهشی
- مجله: Asian Journal of Green Chemistry
- نوع مقاله: Journal Article
- کلمات کلیدی: N,N',N'-Tetramethylethylene-diaminium-N,N'-disulfonic acid chloride {[TMEDSA][Cl]2} Sulfonic acid-functionalized ionic liquid 4H-Pyrano[2,3-c]pyrazole α-Carbamatoalkyl-β-naphthol α-Amidoalkyl-β-naphthol
- چکیده:
- چکیده انگلیسی: In this work, N,N,N',N'-tetramethylethylene-diaminium-N,N'-disulfonic acid chloride {[TMEDSA][Cl]2} has been utilized as a highly effective catalyst in order to promote the following organic transformations under green, solvent-free and mild conditions: (i) the synthesis of 4H-pyrano[2, 3-c]pyrazoles from aromatic aldehydes, 3-methyl-1-phenyl-2-pyrazolin-5-one and malononitrile, (ii) the preparation of α-carbamatoalkyl-β-naphthols from arylaldehydes, β-naphthol and alkyl carbamates, and (iii) the production of α-amidoalkyl-β-naphthols from arylaldehydes, β-naphthol and amides.
- انتشار مقاله: 01-11-1397
- نویسندگان: Sharareh Ravanshad,Hakimeh Asvar,Fatemeh Fouladi,Arezoo Pourkazemi,Maasoomeh Shamsizadeh,Maryam Khalili,Maria Merajoddin,Abdolkarim Zare
- مشاهده