- Catalytic application of sulfamic acid-functionalized magnetic Fe3O4nanoparticles (SA-MNPs) for protection of aromatic carbonyl compounds and alcohols: Experimental and theoretical studies
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Protection techniques of functional groups within the structure of organic compounds are important synthetic methods against unwanted attacks from various reagents during synthetic sequences. Acetal and thioacetal groups are well known as protective funct
- Khaef, Sepideh,Taherpour, Avat Arman,Yarie, Meysam,Zolfigol, Mohammad Ali
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p. 44946 - 44957
(2020/12/30)
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- H3PW12O40at the[bmim][FeCl4]: A green catalytic system for alkoxymethylation of alcohols and their one-pot interconversion to acetates and TMS-ethers
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12-Tungstophosphoric acid immobilized on [bmim][FeCl4] was found to be an efficient catalyst for chemoselective methoxymethylation and ethxoymethylation of alcohols and also one-pot conversion of MOM- or EOM-ethers to their corresponding acetates and TMS-ethers under thermal conditions and microwave irradiation. These procedures were simple, rapid and the corresponding products were obtained in high yields. The catalyst exhibited remarkable reactivity and was reusable.
- Mohammadpoor-Baltork,Moghadam,Tangestaninejad,Mirkhani,Khosropour,Mirjafari
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experimental part
p. 513 - 524
(2012/06/16)
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- High-valent [SnIV(Br8TPP)(OTf)2] as a highly efficient and reusable catalyst for selective methoxymethylation of alcohols and phenols: The effect of substituted bromines on the catalytic activity
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High-valent tin(IV)octabromotetraphenylporphyrinato trifluoromethanesulfonate, [SnIV(Br8TPP)(OTf)2], was used for selective methoxymethylation of alcohols and phenols with formaldehyde dimethyl acetal (FDMA) at room temper
- Moghadam, Majid,Tangestaninejad, Shahram,Mirkhani, Valiollah,Mohammadpoor-Baltork, Iraj,Khajehzadeh, Mostafa,Kosari, Farshid,Araghi, Mehdi
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experimental part
p. 238 - 243
(2010/04/04)
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- Highly efficient and selective methoxymethylation of alcohols and phenols catalyzed by high-valent tin(IV) porphyrin
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An efficient and selective method for methoxymethylation of alcohols and phenols with formaldehyde dimethyl acetal (FDMA) catalyzed by electron deficient tin(IV)tetraphenylporphyrinato trifluoromethanesulfonate, [SnIV(TPP)(OTf)2], is
- Gharaati, Shadab,Moghadam, Majid,Tangestaninejad, Shahram,Mirkhani, Valiollah,Mohammadpoor-Baltork, Iraj,Kosari, Farshid
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experimental part
p. 1995 - 2000
(2011/01/07)
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- Highly efficient and selective methoxymethylation of alcohols and phenols catalyzed by reusable ZrO(OTf)2 under solvent-free conditions
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Different primary, secondary, and tertiary alcohols were efficiently converted to their corresponding methoxymethyl ethers with formaldehyde dimethyl acetal in the presence of catalytic amounts of ZrO(OTf)2 at room temperature. Phenols were als
- Moghadam, Majid,Tangestaninejad, Shahram,Mirkhani, Valiollah,Mohammadpoor-Baltork, Iraj,Khajehzadeh, Mostafa
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experimental part
p. 641 - 647
(2011/05/04)
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- Melamine trisulfonic acid (MTSA): A new efficient catalyst for the chemoselective methoxymethylation of alcohols
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Melamine trisulfonic acid, which is easily prepared by the reaction of melamine with neat chlorosulfonic acid, is able to efficiently catalyze the chemoselective methoxymethylation of alcohols with dimethoxymethane (DMM). All reactions were performed unde
- Shirini, Farhad,Zolfigol, Mohammad Ali,Albadi, Jalal
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experimental part
p. 910 - 914
(2010/05/01)
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- N,N,N′,N′-tetrabromobenzene-1,3-disulfonamide and poly(N-bromo-N-ethyl-benzene-1,3-disulfonamide) as efficient catalysts for the methoxymethylation of alcohols under solvent-free conditions
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Methoxymethylation of a variety of alcohols was performed using formaldehyde dimethyl acetal in the presence of N,N,N′,N′- tetrabromobenzene-1,3-disulfonamide [TBBDA] and poly(N-bromo-N-ethyl-benzene-1, 3-disulfonamide) [PBBS] as catalysts at room tempera
- Ghorbani-Vaghei, Ramin,Zolfigol, Mohammad Ali,Amiri, Mostafa,Veisi, Hojat
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experimental part
p. 632 - 635
(2009/05/07)
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- H3PW12O40 - A selective, environmentally benign, and reusable catalyst for the preparation of methoxymethyl and ethoxymethyl ethers and their deprotections under mild conditions
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Different types of primary and secondary alcohols were efficiently transformed to their corresponding methoxymethyl (MOM) and ethoxymethyl (EOM) ethers in the presence of catalytic amounts of H3PW 12O40 at room temperature under solvent-free conditions. Selective protection of primary and secondary alcohols in the presence of phenols and tertiary alcohols was achieved by this method. Deprotection of these ethers to their parent alcohols was also performed using this catalyst in ethanol under reflux conditions. We have also found that primary and secondary MOM- and EOM-ethers are selectively deprotected in the presence of phenolic and tertiary ones, methyl and benzyl ethers, esters, and trimethylsilyl ethers by this catalyst. The notable advantages of this protocol are high yields, short reaction times, easy work-up, non-toxicity, easy availability and handling, eco-friendly, and reusability of the catalyst.
- Mohammadpoor-Baltork, Iraj,Moghadam, Majid,Tangestaninejad, Shahram,Mirkhani, Valiollah,Mirjafari, Arsalan
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p. 831 - 840
(2008/12/21)
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- Metal hydrogen sulfates catalyzed methoxymethylation of alcohols under solvent-free conditions
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Methoxymethylation of a variety of alcohols was performed by using formaldehyde dimethoxy acetal in the presence of metal hydrogen sulfate M(HSO4)n at room temperature and solvent-free conditions. The methoxymethyl ethers (MOM-ethers
- Niknam, Khodabakhsh,Zolfigol, Mohammad Ali,Shayegh, Mohsen,Zare, Reza
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p. 1067 - 1073
(2008/02/13)
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