Abolfazl Olyaei
Department of Chemistry, Payame Noor University, PO BOX 19395-3697, Tehran, Iran.
[ 1 ] - An efficient green synthesis of some new 4H-pyrimido[2,1,b]benzimiazoles and 4H-pyrimido[2,1,b]benzothiazoles promoted by guanidinium chloride
A facile and highly efficient protocol was applied successfully to synthesize 4H-pyrimido[2,1,b]benzimiazoles and 4H-pyrimido[2,1,b]benzothiazoles through one-pot three-component cyclocondensation reactions of 2-aminobenzimidazole or 2-aminobenzothiazole with dimedone and aromatic aldehydes in the presence of guanidinium chloride under solvent-free conditions. The reactions us...
[ 2 ] - An efficient solvent-free synthesis of 1,8-dioxo-octahydroxanthenes by using Fe2(SO4)3.7H2O as catalyst
A facile and efficient protocol for the synthesis of 1,8-dioxo-octahydroxanthenes has been developed by one-pot Knoevenagel condensation, Michael addition and cyclodehydration reaction of dimedone (active methylene carbonyl compound) with aromatic aldehydes in the presence of Iron (III) sulfate hydrate as a solid acidic catalyst under solvent-free conditions. Various aromatic aldehydes were uti...
[ 3 ] - An efficient green synthesis of highly substituted imidazoles catalyzed by Al-MCM-41 nanoreactors
Al-MCM-41 nanoreactors is found to be a remarkable efficient catalyst for one-pot multicomponent cyclocondensation of benzil, aniline or ammonium acetate and aromatic aldehydes for the synthesis of polysubstituted imidazoles under solvent-free conditions. The reaction was efficiently promoted by 10 mg nano-Al-MCM-41 and the heterogeneous catalyst was recycled for four runs in this reaction with...
[ 4 ] - An efficient green synthesis of some new 4H-pyrimido[2,1,b]benzimiazoles and 4H-pyrimido[2,1,b]benzothiazoles promoted by guanidinium chloride
A facile and highly efficient protocol was applied successfully to synthesize 4H-pyrimido[2,1,b]benzimiazoles and 4H-pyrimido[2,1,b]benzothiazoles through one-pot three-component cyclocondensation reactions of 2-aminobenzimidazole or 2-aminobenzothiazole with dimedone and aromatic aldehydes in the presence of guanidinium chloride under solvent-free conditions. The reactions us...
[ 5 ] - سنتز و شناسایی نانوکاتالیست نوین و قابل بازیافت پالادیم N- هتروسیکل کاربن دارای پیریمیدین تثبیت شده بر روی بستر ارگانوسیلیکا (PMO) و بررسی کارایی آن در واکنش سوزوکی ـ میورا
در این پژوهش، کمپلکس N– هتروسیکل کاربن پالادیم دارای پیریمیدین تثبیت شده روی بستر ارگانوسیلیکا ( Pd-Pym-NHC@PMO) از 2-آمینوپیریمیدین در چهار مرحله واکنش سنتز شد. ساختار و ویژگیهای فیزیکی و شیمیایی Pd-Pym-NHC@PMO با استفاده ازفناوریهای گوناگون آنالیز اسپکتروسکوپی مانند XRD،CP-MAS-NMR،AAS، TGAو تخلخل سنجی BET تعیین شد. پس از شناسایی، فعالیت کاتالیستی آن در سنتز بی آریل ها با استفاده از ...
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