نتایج جستجو برای: Trans-thioacetalization

تعداد نتایج: 65652  

Journal: :iranian journal of catalysis 2011
bi bi fatemeh mirjalili abdolhamid bamoniri ali akbari

nano-silica supported boron trifluoride (bf3.sio2) is an efficient, reusable and eco-friendly catalyst for chemoselective thioacetalization of aldehydes and ketones. so, this catalyst was applied for transthioacetalization of acetals and acylals into their corresponding 1,3-dithiolanes or 1,3-dithianes  in good to excellent yields. the reactions were carried out at room temperature under solven...

Nano-silica supported boron trifluoride (BF3.SiO2) is an efficient, reusable and eco-friendly catalyst for chemoselective thioacetalization of aldehydes and ketones. So, this catalyst was applied for transthioacetalization of acetals and acylals into their corresponding 1,3-dithiolanes or 1,3-dithianes  in good to excellent yields. The reactions were carried out at room temperature under solven...

Nano-silica supported boron trifluoride (BF3.SiO2) is an efficient, reusable and eco-friendly catalyst for chemoselective thioacetalization of aldehydes and ketones. So, this catalyst was applied for transthioacetalization of acetals and acylals into their corresponding 1,3-dithiolanes or 1,3-dithianes  in good to excellent yields. The reactions were carried out at room temperature under solven...

Journal: :Organic & biomolecular chemistry 2016
Jin-Sheng Yu Wen-Biao Wu Feng Zhou

We report here the first catalytic asymmetric thioacetalization of salicylaldehyde and dithiol. Chiral phosphoric acid STRIP C5 is identified as a powerful catalyst for this reaction to afford various chiral dithioacetals in high to excellent yields and enantioselectivities under mild conditions.

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - دانشکده علوم 1389

selective desulfurization of thiocarbonyls to carbonyls thioacetalization of aldehydes and ketones a useful reagent system for the dethioacetalization reactions

Journal: :Journal of The Serbian Chemical Society 2021

An attempt to synthesize the cyclohexane core of antibiotic abyssomicin C is described. The initial, protecting group-free approach (relying on internal protection) failed and had be modified, in order allow for efficient deprotection acid-sensitive cyclization precursor penultimate synthetic step. Thus, a pyranoside structural unit was used as latent lactone/ester functionality, which deprotec...

پایان نامه :دانشگاه آزاد اسلامی - دانشگاه آزاد اسلامی واحد تهران مرکزی - دانشکده اقتصاد و حسابداری 1391

فن آوری اطلاعات در دهه های اخیر تمام ابعاد زندگی بشر را تحت تاثیر قرار داده و در این میان صنعت بانکداری نیز تحول معنی داری را تجربه کرده است. بدیهی است کاربرد بانکداری الکترونیکی زمانی مفید ارزیابی می شود که سودآوری بانکها را افزایش دهد.این پژوهش درصدد است با در نظر گرفتن 10بانک اقتصاد نوین، تجارت، پارسیان، پاسارگاد، سامان، سپه، سینا، صادرات، ملت و ملی طی سالهای 1386تا 1389 و بر اساس مدل داده ه...

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