Results 11 to 20 of about 2,457 (204)

Synthesis and evaluation of new guanidine-thiourea organocatalyst for the nitro-Michael reaction: Theoretical studies on mechanism and enantioselectivity

Beilstein Journal of Organic Chemistry, 2012
A new guanidine-thiourea organocatalyst has been developed and applied as bifunctional organocatalyst in the Michael addition reaction of diethyl malonate to trans-β-nitrostyrene.
Tatyana E Shubina, Matthias Freund, Sebastian Schenker   +2 more
exaly   +2 more sources

Bifunctional C2-symmetric ionic liquid-supported (S)-proline as a recyclable organocatalyst for Mannich reactions in neat condition

Results in Chemistry, 2021
A bi-functional C2-symmetric ionic liquid-supported (S)-Proline organocatalyst [BHEDIMP][CF3CO2] has been designed and synthesized for the first time.
Prabhakara Madivalappa Davanagere, Barnali Maiti   +1 more
doaj   +1 more source

Mechanistic Insights into the Selective Synthesis of 4H-Pyran Derivatives On-Water Using Naturally Occurring Alginate from Sargassum muticum: Experimental and DFT Study

Gels, 2022
The naturally occurring sodium alginate (SA) biopolymer from the Sargassum muticum (Yendo) Fensholt was employed as a green organocatalyst for the synthesis of 4H-pyran derivatives.
Khaoula Oudghiri, Zahira Belattmania, Hamid Elmouli, Salaheddine Guesmi, Fouad Bentiss, Brahim Sabour, Lahoucine Bahsis, Moha Taourirte   +7 more
doaj   +1 more source

Origin of catalytic activity differences between phosphine and phosphine oxide-based structures in the water-crosslinkable polyalkoxysilane composition [PDF]

Polyolefins Journal, 2021
Organocatalysts have attracted enormous interest in the water-crosslinking reaction in silane-grafted polyolefins (SGPOs) system owing to their simplicity, low toxicity and environmentally benign nature compared to organotin catalysts, which are most ...
Tanaka Shohei, Kenta Adachi
doaj   +1 more source

Recent advances and prospects in the organocatalytic synthesis of quinazolinones

Frontiers in Chemistry, 2022
Quinazolinone, a bicyclic compound, comprises a pyrimidine ring fused at 4´ and 8´ positions with a benzene ring and constitutes a substantial class of nitrogen-containing heterocyclic compounds on account of their frequent existence in the key fragments
Biplob Borah, Sidhartha Swain, Mihir Patat, L. Raju Chowhan   +3 more
doaj   +1 more source

Synthesis and alcohol catalytic properties of TEMPO functionalized Zr-based MOFs

Cailiao gongcheng, 2020
A strategy based on grafting organocatalytic units as side-chain on the organic linkers, a TEMPO radical decorated terphenyl-dicarboxylic acid linker was synthesized.
ZHUANG Jin-liang, LIU Xiang-yue, DU Xuan
doaj   +1 more source

Carbapenems as water soluble organocatalysts [PDF]

Wellcome Open Research, 2018
Background: Identification of organocatalysts functioning in aqueous environments will provide methods for more sustainable chemical transformations and allow tandem reactions with biocatalysts, like enzymes.
Thomas L. Williams, Alexander R. Nödling, Yu-Hsuan Tsai, Louis Y. P. Luk   +3 more
openaire   +2 more sources

One-Pot Synthesis of Novel Chiral β-Amino Acid Derivatives by Enantioselective Mannich Reactions Catalyzed by Squaramide Cinchona Alkaloids

Molecules, 2013
An efficient one-pot synthesis of novel β-amino acid derivatives containing a thiadiazole moiety was developed using a chiral squaramide cinchona alkaloid as organocatalyst.
Kankan Zhang, Xueping Liang, Ming He, Jian Wu, Yuping Zhang, Wei Xue, Linhong Jin, Song Yang, Deyu Hu   +8 more
doaj   +1 more source

Enantioselective Organocatalyzed Michael Addition of Isobutyraldehyde to Maleimides in Aqueous Media

Molecules, 2022
Thiourea was introduced into (R,R)-1,2-diphenylethylenediamine as an organocatalyst to promote the reaction between isobutyraldehydes and maleimides. Enantioselective Michael addition reaction was carried out as an eco-friendly method using water as the ...
Jae Ho Shim, Seok Hyun Cheun, Hyeon Soo Kim, Deok-Chan Ha   +3 more
doaj   +1 more source

Azidophosphonium salt-directed chemoselective synthesis of (E)/(Z)-cinnamyl-1H-triazoles and regiospecific access to bromomethylcoumarins from Morita–Baylis–Hillman adducts

Beilstein Journal of Organic Chemistry, 2020
The direct transformation of Morita–Baylis–Hillman (MBH) adducts into molecules of interest is a crucial process wherein allylic hydroxy-protected or halogenated MBH adducts are commonly preferred.
Soundararajan Karthikeyan, Radha Krishnan Shobana, Kamarajapurathu Raju Subimol, J. Helen Ratna Monica, Ayyanoth Karthik Krishna Kumar   +4 more
doaj   +1 more source