Supported iron catalysts for Michael addition reactions

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Efficient Tertiary Amine/Weak Acid Bifunctional Mesoporous Silica Catalysts for Michael Addition Reactions

The Michael reaction, which involves 1,4-addition of a nucleophile (preferably a C-nucleophile) to an a,b-unsaturated compound, offers a simple yet effective way of making C C bonds, which makes it one of the most widely used reactions in both industry and academia. The reaction, as first reported by Arthur Michael in 1887, involves primarily the attack of a Cnucleophile, generated from compoun...

متن کامل

Supported bifunctional thioureas as recoverable and reusable catalysts for enantioselective nitro-Michael reactions

The catalytic activity of different supported bifunctional thioureas on sulfonylpolystyrene resins has been studied in the nitro-Michael addition of different nucleophiles to trans-β-nitrostyrene derivatives. The activity of the catalysts depends on the length of the tether linking the chiral thiourea to the polymer. The best results were obtained with the thiourea derived from (L)-valine and 1...

متن کامل

Investigation into thiol-(meth)acrylate Michael addition reactions using amine and phosphine catalysts†

This work describes a study into thiol–ene based Michael addition reactions. Different catalysts, primary and tertiary amines and phosphines, were investigated for the reaction of a range of thiols with dimers and oligomers of some (meth)acrylates. Primary and tertiary amines are efficient catalysts for the thiol–ene reaction, although these catalysts require several hours to reach high convers...

متن کامل

Asymmetric Michael addition reactions of nitroalkanes to 2-furanones catalyzed by bifunctional thiourea catalysts.

The first bifunctional thiourea catalyzed asymmetric Michael addition reactions of nitroalkanes to 2-furanones are described. The highly functionalized γ-lactones with two or three consecutive stereogenic carbons were obtained in high yields (up to 99%), high diastereoselectivities (up to >20 : 1 dr) and enantioselectivities (up to >99% ee).

متن کامل

Carbocations as Lewis acid catalysts in Diels-Alder and Michael addition reactions.

In general, Lewis acid catalysts are metal-based compounds that owe their reactivity to a low-lying empty orbital. However, one potential Lewis acid that has received negligible attention as a catalyst is the carbocation. We have demonstrated the potential of the carbocation as a highly powerful Lewis acid catalyst for organic reactions. The stable and easily available triphenylmethyl (trityl) ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Molecular Catalysis

سال: 2018

ISSN: 2468-8231

DOI: 10.1016/j.mcat.2017.12.029