5601-23-0Relevant academic research and scientific papers
KOtBu-Catalyzed Michael Addition Reactions Under Mild and Solvent-Free Conditions
Thiyagarajan, Subramanian,Krishnakumar, Varadhan,Gunanathan, Chidambaram
supporting information, p. 518 - 523 (2020/02/04)
Designed transition metal complexes predominantly catalyze Michael addition reactions. Inorganic and organic base-catalyzed Michael addition reactions have been reported. However, known base-catalyzed reactions suffer from the requirement of solvents, additives, high pressure and also side-reactions. Herein, we demonstrate a mild and environmentally friendly strategy of readily available KOtBu-catalyzed Michael addition reactions. This simple inorganic base efficiently catalyzes the Michael addition of underexplored acrylonitriles, esters and amides with (oxa-, aza-, and thia-) heteroatom nucleophiles. This catalytic process proceeds under solvent-free conditions and at room temperature. Notably, this protocol offers an easy operational procedure, broad substrate scope with excellent selectivity, reaction scalability and excellent TON (>9900). Preliminary mechanistic studies revealed that the reaction follows an ionic mechanism. Formal synthesis of promazine is demonstrated using this catalytic protocol.
TRIAZOLE-BASED READER MOLECULES AND METHODS FOR SYNTHESIZING AND USE THEREOF
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Paragraph 0056, (2017/01/02)
Triazole-based molecules, methods of making and using the same are provided. Triazole-based molecules may be used as reading molecules and incorporated into or operatively-linked with electrodes, for example, and used in recognition tunneling systems to i
Visible light promoted thiol-ene reactions using titanium dioxide
Bhat, Venugopal T.,Duspara, Petar A.,Seo, Sangwon,Abu Bakar, Nor Syazwani Binti,Greaney, Michael F.
supporting information, p. 4383 - 4385 (2015/03/18)
The radical addition of thiols to alkenes is reported under photoredox conditions, using visible light and TiO2 as a cheap and readily available photocatalyst.
Dithiooxamide as an Effective Sulfur Surrogate for Odorless High-Yielding Carbon-Sulfur Bond Formation in Wet PEG200 as an Eco-Friendly, Safe, and Recoverable Solvent
Firouzabadi, Habib,Iranpoor, Nasser,Gorginpour, Forough,Samadi, Arash
supporting information, p. 2914 - 2920 (2015/05/04)
In this study, we have employed dithiooxamide, a solid, odorless, and commercially available compound, as a sulfur surrogate for the preparation of dialkyl sulfides from available alkyl halides in high yields. This sulfur transfer agent was also used for a copper-catalyzed high-yielding preparation of diaryl sulfides from their available aryl halides and for the preparation of thia-Michael adducts in high yields. All the reactions were performed under odorless conditions in wet PEG200 (PEG = polyethylene glycol), which is an eco-friendly, safe, and recoverable solvent. The protocols were easily applicable to large-scale operation.
PHARMACEUTICAL USE OF 3-BENZYLSULFONYLPROPIONITRILE
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Paragraph 9, (2015/04/22)
The present invention is directed to a pharmaceutical composition comprising a pharmaceutically acceptable carrier and 3-benzylsulfonylpropionitrile, or a pharmaceutically acceptable salt thereof. The present invention is directed to a method for treating
An atom-economic and odorless thia-Michael addition in a deep eutectic solvent
Azizi, Najmedin,Yadollahy, Zahra,Rahimzadeh-Oskooee, Amin
, p. 1722 - 1725 (2014/03/21)
The first 100% atom-efficient and odorless protocol for carbon-sulfur bond formation in a deep eutectic solvent (DES) as both the reaction medium and catalyst is reported. The biodegradable and inexpensive DES provides an efficient and convenient ionic reaction medium for the thia-Michael addition with in situ generation of S-alkylisothiouronium salts in place of thiols without the urea by-product segment. This protocol offers several advantages including short reaction times, high yields, clean reactions, and inexpensive and commercially available starting materials.
Mild hydrosulfenylation of Olefins under neutral conditions using a defined NHC-ligated iron-sulfur catalyst
Alt, Isabel,Rohse, Philipp,Plietker, Bernd
, p. 3002 - 3005 (2014/01/06)
A defined NHC-Fe-S complex proved to be an efficient catalyst for the selective hydrosulfenylation of α,β-unsaturated ketones or vinylnitriles. A wide range of different aliphatic thiols were transferred in this atom-economic reaction into the correspondi
Novel atom-economic reaction: Comprehensive utilization of S-alkylisothiouronium salt in the synthesis of thioethers and guanidinium salts
Gao, Pengchao,Leng, Penglin,Sun, Qi,Wang, Xin,Ge, Zemei,Li, Runtao
, p. 17150 - 17155 (2013/09/24)
A novel atom-economic three-component one-pot reaction of a primary amine, an S-alkylisothiouronium salt and a Michael receptor is reported, which affords a guanidinium salt and thioether simultaneously. The guanidine moiety is involved in catalyzing the conjugated Michael addition of the mercaptan. The reaction proceeds under ambient conditions using a non-toxic EtOH-H2O mixture as the solvent, and the two products can be very easily purified. Complete atom economy is achieved by fully utilizing the S-alkylisothiouronium salt and converting the previously wasted mercaptan by-product into the valuable thioether.
Pronounced catalytic effect of a micellar solution of sodium dodecyl sulfate (SDS) on the efficient C-S bond formation via an odorless thia-michael addition reaction through the in situ generation of S-alkylisothiouronium salts
Firouzabadi, Habib,Iranpoor, Nasser,Abbasi, Mohammad
experimental part, p. 755 - 766 (2009/11/30)
A pronounced catalytic effect of sodium dodecyl sulfate (SDS) was observed on the in situ production of 5-alkylisothiouronium salts via the reaction of primary, allyl and benzyl halides with thiourea in SDS droplets .Hydrolysis of the generated Salkylisot
Thia-Michael addition using cheap and odorless S-alkylisothiouronium salts as thiol equivalents in water
Zhao, Yan,Ge, Ze-Mei,Cheng, Tie-Ming,Li, Run-Tao
, p. 1529 - 1532 (2008/02/04)
S-Alkylisothiouronium salt has been found to be a non-toxic, odorless and simply operational alternative of thiol for the thia-Michael addition with electron-deficient olefins. The reactions were carried out under alkaline conditions in water at room temperature within 5-20 minutes to afford the expected products in good to excellent yields. Georg Thieme Verlag Stuttgart.
