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مقاله
1 - تأثیر بارانهای اسیدی بر روی محیط زیست و آثار باستانی تختجمشیدانسان و محیط زیست , شماره 4 , سال 8 , پاییز 1389با توجه به تخریب سنگهای منطقهی باستانی تختجمشید تصمیم گرفته شد تا عوامل مؤثر بر این فرایند بررسی شود. این تحقیق با مطالعه ی نقشههای جغرافیایی و نمودار بادهای فصلی و سالیانه منطقه و همچنین نمونهگیری از آب باران پیگیری شد. نمونهگیری آب های مختلف از مکانهای متفاوت چکیده کاملبا توجه به تخریب سنگهای منطقهی باستانی تختجمشید تصمیم گرفته شد تا عوامل مؤثر بر این فرایند بررسی شود. این تحقیق با مطالعه ی نقشههای جغرافیایی و نمودار بادهای فصلی و سالیانه منطقه و همچنین نمونهگیری از آب باران پیگیری شد. نمونهگیری آب های مختلف از مکانهای متفاوت و مشخص شهرستان مرودشت در زمانهای معین در سه فصل پاییز، زمستان و بهار به منظور اندازهگیری اسیدیتهی آبها انجام شد. pH نمونه های ناحیه تختجمشید در سه فصل نمونهگیری بین 97/5 و 57/6 بودند و علت آن باران های اسیدی می باشد که یکی از مهم ترین عوامل در تخریب و فرسایش نقوش برجستهی آثار تاریخی مذکور هستند. چنین پیش بینی می گردد که آلایندههای متصاعد شده از مجتمع پتروشیمی شیراز و صنایع شهر مرودشت و نیز خودروهای شهرستان توسط بادهای مذکور به سمت غرب و شمال غرب منطقه حرکت کرده و با برخورد به کوه رحمت در دامنهی این کوه که منطقهی باستانی تختجمشید میباشد در آب باران حل شده و باعث ریزش باران اسیدی و متعاقبا تخریب سنگ ها و محیط زیست ناحیه میگردد پرونده مقاله -
مقاله
2 - Synthesis of imidazo[2,1-b]thiazole-3-carboxylate through the reaction of thiohydantoins and ethylbromopyruvatejournal of chemical reactivity and synthesis , شماره 2 , سال 1 , پاییز 2011Imidazo[2,1-b]thiazoles are obtaind in excellent yields from the addition reaction between thiohydantoin and ethylbromopyruvate. These imidazo[2,1-b]thiazoles in the presence of p-TSA in boiling toluene refluxed for 2.5 hours led to imidazo[2,1-b]thiazole-3-carboxylates چکیده کاملImidazo[2,1-b]thiazoles are obtaind in excellent yields from the addition reaction between thiohydantoin and ethylbromopyruvate. These imidazo[2,1-b]thiazoles in the presence of p-TSA in boiling toluene refluxed for 2.5 hours led to imidazo[2,1-b]thiazole-3-carboxylates in elimination reactions پرونده مقاله -
مقاله
3 - Synthesis of Novel imidazo[2,1-b]thiazoles from thiohydantoins and Diethyl oxalatejournal of chemical reactivity and synthesis , شماره 2 , سال 1 , پاییز 2011Novel imidazo[2,1-b]thiazoles were synthesized in good yield via a mild reaction of thiophenytoin and diethyl oxalatein the presence of 10% mol p-TSA.Novel imidazo[2,1-b]thiazoles were synthesized in good yield via a mild reaction of thiophenytoin and diethyl oxalatein the presence of 10% mol p-TSA. پرونده مقاله -
مقاله
4 - Chemical Composition of the Essential Oil Salvia Officinal from Shiraz Greenhousejournal of chemical reactivity and synthesis , شماره 2 , سال 3 , بهار 2013The genus is distributed throughout the Old World and the Americas, with three distinct regions of diversity: Central and shake the limbs and topic in folk medicine. South America (approx. 500 species), Central Asia and Mediterranean (250 species), Eastern Asia (90 spec چکیده کاملThe genus is distributed throughout the Old World and the Americas, with three distinct regions of diversity: Central and shake the limbs and topic in folk medicine. South America (approx. 500 species), Central Asia and Mediterranean (250 species), Eastern Asia (90 species)various species of the genus salvia are used as Disinfectants, Epileptics Autodigestion, Reduce blood sugar donor, Carminative, Treatment of seizures, Joint pain and dizziness and migraines, Low ering blood sugar. پرونده مقاله -
مقاله
5 - reaction of thiohydantoins and ethylbromopyruvate for Synthesis of imidazo[2,1-b]thiazole 3-carboxylatejournal of chemical reactivity and synthesis , شماره 2 , سال 5 , زمستان 2015Imidazo[2,1-b]thiazoles are obtaind in excellent yields from the addition reaction between thiohydantoin and ethylbromopyruvate. These imidazo[2,1-b]thiazoles in the presence of p-TSA in boiling toluene refluxed for 2.5 hours led to imidazo[2,1-b]thiazole-3-carboxylates چکیده کاملImidazo[2,1-b]thiazoles are obtaind in excellent yields from the addition reaction between thiohydantoin and ethylbromopyruvate. These imidazo[2,1-b]thiazoles in the presence of p-TSA in boiling toluene refluxed for 2.5 hours led to imidazo[2,1-b]thiazole-3-carboxylates in elimination reactions پرونده مقاله -
مقاله
6 - A New synthesis of functionalized imidazo[2,1-b][1,3]thiazines with thiohydantoins, isocyanides and dialkyl acetylenedicarboxylatesjournal of chemical reactivity and synthesis , شماره 2 , سال 1 , تابستان 2011The reaction of stoichiometric amounts of dialkyl acetylenedicarboxylates with alkyl isocyanides and 5,5-diaryl thiohydantoins in toluene and catalytic amount of p-TSA afforded imidazo[2,1-b][1,3]thiazines in good overall yieldsThe reaction of stoichiometric amounts of dialkyl acetylenedicarboxylates with alkyl isocyanides and 5,5-diaryl thiohydantoins in toluene and catalytic amount of p-TSA afforded imidazo[2,1-b][1,3]thiazines in good overall yields پرونده مقاله -
مقاله
7 - Chemical Composition of the Essential Oil Salvia Officinal from Shiraz Greenhousejournal of chemical reactivity and synthesis , شماره 2 , سال 3 , زمستان 2013The genus is distributed throughout the Old World and the Americas, with three distinct regions of diversity: Central and shake the limbs and topic in folk medicine. South America (approx. 500 species), Central Asia and Mediterranean (250 species), Eastern Asia (90 spec چکیده کاملThe genus is distributed throughout the Old World and the Americas, with three distinct regions of diversity: Central and shake the limbs and topic in folk medicine. South America (approx. 500 species), Central Asia and Mediterranean (250 species), Eastern Asia (90 species)various species of the genus salvia are used as Disinfectants, Epileptics Autodigestion, Reduce blood sugar donor, Carminative, Treatment of seizures, Joint pain and dizziness and migraines, Low ering blood sugar پرونده مقاله -
مقاله
8 - Chemoselective Reaction Between 5,5-Diarylhydantoins and Acetylenic Esters in the Presence of Trialkyl PhosphitePhysical Chemistry & Electrochemistry , شماره 5 , سال 3 , زمستان 2015The adducts produced in the reaction between trialkyl phosphites and acetylenic esters were trapped by hydantoins to produce highly functionalized dialkyl 2-(2,5-dioxo-4,4-diphenylimidazolidin-1-yl) succinate in good yields.The adducts produced in the reaction between trialkyl phosphites and acetylenic esters were trapped by hydantoins to produce highly functionalized dialkyl 2-(2,5-dioxo-4,4-diphenylimidazolidin-1-yl) succinate in good yields. پرونده مقاله -
مقاله
9 - An Efficient One-pot Synthesis of Dialkyl fumarates Mediated by inyltriphenylphosphonium Salt in the Intramolecular Wittig ReactionPhysical Chemistry & Electrochemistry , شماره 5 , سال 3 , زمستان 2015An efficient three-component reaction of dialkyl acetylendicarboxylates and 2-Pyrrolidin in the presence of triphenylphosphine produces dialkyl 2-(2-Pyrrolidin-N-yl)-3-(triphenylphosphanylidene)succinate. These phosphoranes undergo mild intramolecular Wittig reaction to چکیده کاملAn efficient three-component reaction of dialkyl acetylendicarboxylates and 2-Pyrrolidin in the presence of triphenylphosphine produces dialkyl 2-(2-Pyrrolidin-N-yl)-3-(triphenylphosphanylidene)succinate. These phosphoranes undergo mild intramolecular Wittig reaction to produce dialkyl (E)-2-(4,5-dihydro-3H-pyrrol-2-yl)fumarate in excellent yields. پرونده مقاله