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Zeynizadeh, Behzad,Shirini, Farhad Korean Chemical Society 2003 Bulletin of the Korean Chemical Society Vol.24 No.3
α,β-Unsaturated aldehydes and ketones are regioselectively reduced to the corresponding allylic alcohols with .$NaBH_4$/Dowex1-x8 system in THF at room temperature. This system is also efficient for the conversion of α-diketones and acyloins to the vicinal diols in refluxing THF.
Zeynizadeh, Behzad,Sadighnia, Leila Korean Chemical Society 2010 Bulletin of the Korean Chemical Society Vol.31 No.9
Catalytic conversion of structurally different epoxides to the corresponding 1,2-diacetoxy esters was carried out readily with phosphomolybdic acid alone or its supported on $SiO_2$. The reactions were carried out under solvolytic or solvent free conditions within 5-15 min at room temperature. The product 1,2-diacetates were obtained in high to excellent yields. Supporting of phosphomolybdic acid on $SiO_2$ showed the better catalytic activity than $Al_2O_3$. Conversion of optically pure R-(+)-styrene oxide to S-(+)-1,2-diacetoxy-1-phenylethane was carried with phosphomolybdic acid in high yield and stereospecificity.
Zeynizadeh, Behzad,Kouhkan, Mehri Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.9
Solvent-free reduction of various aldoximes and ketoximes to the corresponding amines was performed easily and efficiently with $NaBH_4$ in the presence of $ZrCl_4$ supported on $Al_2O_3$. The reactions were carried out rapidly (within 2 min) at room temperature to afford the amines in high to excellent yields.
Reductive Acetylation of Carbonyl Compounds to Acetates with Pyridine Zinc Borohydride
Zeynizadeh, Behzad,Setamdideh, Davood,Faraji, Fariba Korean Chemical Society 2008 Bulletin of the Korean Chemical Society Vol.29 No.1
Reductive acetylation of a variety of carbonyl compounds such as aldehydes, ketones and a,b-unsaturated enals/enones was carried out efficiently with pyridine zinc borohydride, (Py)Zn(BH4)2, in a mixture of THF-EtOAc at room temperature or under reflux condition. The corresponding acetates were obtained in high to excellent yields. In addition, chemoselective reductive acetylation of aldehydes over ketones was achieved perfectly with the reagent at room temperature.
Zeynizadeh, Behzad,Yahyaei, Saiedeh Korean Chemical Society 2003 Bulletin of the Korean Chemical Society Vol.24 No.11
$NaBH_4$ with catalytic amounts of $MoCl_5$ can readily reduce a variety of carbonyl compounds such as aldehydes, ketones, acyloins, ${\alpha}$-diketones and conjugated enones to their corresponding alcohols in good to excellent yields. Reduction reactions were performed under aprotic condition in $CH_3CN$ at room temperature or reflux. In addition, the chemoselective reduction of aldehydes over ketones was accomplished successfully with this reducing system.
Zeynizadeh, Behzad,Faraji, Fariba Korean Chemical Society 2003 Bulletin of the Korean Chemical Society Vol.24 No.4
(Pyridine)(tetrahydroborato)zinc complex, $[Zn(BH_4)_2(py)]$, as a stable white solid, was prepared quantitatively by complexation of an equimolar amount of zinc tetrahydroborate and pyridine at room temperature. This reagent can easily reduce variety of carbonyl compounds such as aldehydes, ketones, acyloins, α-diketones and a, β-unsaturated carbonyl compounds to their corresponding alcohols in good to excellent yields. Reduction reactions were performed in ether or THF at room temperature or under reflux conditions. In addition, the chemoselective reduction of aldehydes over ketones was accomplished successfully with this reducing agent.
Behzad Zeynizadeh,Leila Sadighnia 대한화학회 2010 Bulletin of the Korean Chemical Society Vol.31 No.9
Catalytic conversion of structurally different epoxides to the corresponding 1,2-diacetoxy esters was carried out readily with phosphomolybdic acid alone or its supported on SiO2. The reactions were carried out under solvolytic or solvent free conditions within 5-15 min at room temperature. The product 1,2-diacetates were obtained in high to excellent yields. Supporting of phosphomolybdic acid on SiO2 showed the better catalytic activity than Al2O3. Conversion of optically pure R-(+)-styrene oxide to S-(+)-1,2-diacetoxy-1-phenylethane was carried with phosphomolybdic acid in high yield and stereospecificity.
Behzad Zeynizadeh,Mehri Kouhkan 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.9
Solvent-free reduction of various aldoximes and ketoximes to the corresponding amines was performed easily and efficiently with NaBH_4 in the presence of ZrCl_4 supported on Al_2O_3. The reactions were carried out rapidly (within 2 min) at room temperature to afford the amines in high to excellent yields.
Reductive Acetylation of Carbonyl Compounds to Acetates with Pyridine Zinc Borohydride
Behzad Zeynizadeh,Davood Setamdideh,Fariba Faraji 대한화학회 2008 Bulletin of the Korean Chemical Society Vol.29 No.1
Reductive acetylation of a variety of carbonyl compounds such as aldehydes, ketones and a,b-unsaturated enals/enones was carried out efficiently with pyridine zinc borohydride, (Py)Zn(BH4)2, in a mixture of THF-EtOAc at room temperature or under reflux condition. The corresponding acetates were obtained in high to excellent yields. In addition, chemoselective reductive acetylation of aldehydes over ketones was achieved perfectly with the reagent at room temperature.
Kouhkan, Mehri,Zeynizadeh, Behzad Korean Chemical Society 2011 Bulletin of the Korean Chemical Society Vol.32 No.9
Various aldoximes and ketoximes were efficiently reduced to their corresponding amines with $NaBH_3CN$ in the presence of $MoCl_5/NaHSO_4{\cdot}H_2O$ system. Reduction reactions were carried out in refluxing EtOH or DMF within 0.3-3.8 h to afford the amines in high to excellent yields.