4231-84-9Relevant academic research and scientific papers
Synthetic autocatalysts show organocatalysis of other reactions
Kamioka, Seiji,Ajami, Dariush,Rebek Jr., Julius
, p. 7324 - 7326 (2009)
A molecule capable of both autocatalysis and organocatalysis was synthesized. The autocatalytic activity results from the self-complementary recognition sites provided by hydrogen bonding between heterocyclic subunits and the organocatalysis resides in an embedded thiourea function. The behavior of the molecule suggests both replication and metabolism can be engineered into synthetic compounds.
Enantioselective Sulfa-Michael Addition of Aromatic Thiols to β-Substituted Nitroalkenes Promoted by a Chiral Multifunctional Catalyst
Wei, Qi,Hou, Wenduan,Liao, Na,Peng, Yungui
supporting information, p. 2364 - 2368 (2017/07/22)
An efficient enantioselective Michael addition of a series of aromatic thiols acting as nucleophiles for β-monosubstituted, α,β- and β,β-disubstituted nitroalkenes promoted by a multi-functional chiral catalyst has been developed. The methodology accommodates a wide variety of aryl thiols and nitroalkene substrates, and affords the 2-nitro-1-arylethyl sulfides in excellent yields (up to 99%) and enantioselectivities (up to 99% ee). This reaction could be scaled up to gram even with a dramatically reduced catalyst loading of 0.05 mol%. (Figure presented.).
Desulfurative Chlorination of Alkyl Phenyl Sulfides
Canestrari, Daniele,Lancianesi, Stefano,Badiola, Eider,Strinna, Chiara,Ibrahim, Hasim,Adamo, Mauro F. A.
supporting information, p. 918 - 921 (2017/02/26)
The chlorination of readily available secondary and tertiary alkyl phenyl sulfides using (dichloroiodo)benzene (PhICl2) is reported. This mild and rapid nucleophilic chlorination is extended to sulfa-Michael derived sulfides, affording elimination-sensitive β-chloro carbonyl and nitro compounds in good yields. The chlorination of enantioenriched benzylic sulfides to the corresponding inverted chlorides proceeds with high stereospecificity, thus providing a formal entry into enantioenriched chloro-Michael adducts. A mechanism implying the formation of a dichloro-λ4-sulfurane intermediate is proposed.
Hydrothiolation of Alkenes and Alkynes Catalyzed by 3,4-Dimethyl-5-vinylthiazolium iodide and Poly(3,4-dimethyl-5-vinylthiazolium) iodide
Chun, Supill,Chung, Junyong,Park, Ji Eun,Chung, Young Keun
, p. 2476 - 2481 (2016/08/24)
The highly selective anti-Markovnikov addition of thiols to unactivated alkenes and alkynes was demonstrated by using 3,4-dimethyl-5-vinylthiazolium iodide or its polymer, poly(3,4-dimethyl-5-vinylthiazolium) iodide, as a complementary catalyst. The reaction proceeded cleanly under base-free conditions in air with both aromatic and aliphatic thiols. The polymer catalyst showed a high turnover number (≈5800) and could be reused up to four times without any loss of catalytic activity. DFT calculations supported stabilization of the thiyl radical intermediate by the thiazolium cation, which resulted in reaction of the radical with unsaturated C?C bonds.
Conjugate addition nitro-Mannich reaction of carbon and heteroatom nucleophiles to nitroalkenes
Anderson, James C.,Kalogirou, Andreas S.,Tizzard, Graham J.
, p. 9337 - 9351 (2015/03/05)
The conjugate addition nitro-Mannich reactions of ethyl-β-nitroacrylate (1) and β-nitrostyrene (2) with electron rich aromatic nucleophiles, stabilized carbanions, alcohols, amines, thiols, and diphenyl phosphine oxide were investigated. The one pot conju
Diversity-oriented asymmetric catalysis (DOAC): Stereochemically divergent synthesis of thiochromanes using an imidazoline-aminophenol-nickel-catalyzed michael/henry reaction
Arai, Takayoshi,Yamamoto, Yushi
supporting information, p. 1700 - 1703 (2014/04/17)
The (S,S)-diphenylethylenediamine-derived imidazoline-aminophenol-Ni complex catalyzed tandem asymmetric Michael/Henry reaction of 2-mercaptobenzaldehydes with β-nitrostyrenes to give the corresponding (2S,3R,4R)-2-aryl-3-nitrothiochroman-4-ols in up to 9
An expeditious, highly efficient, catalyst-free and solvent-free synthesis of nitroamines and nitrosulfides by Michael addition
Choudhary, Garima,Peddinti, Rama Krishna
, p. 276 - 282 (2011/04/17)
A simple, atom economical, fast and highly efficient green protocol has been developed for the synthesis of nitroamines and nitrosulfides by the Michael addition of amines and thiols to nitroolefins by simple mixing or grinding. This catalyst-free and solvent-free green approach provided the addition products in quantitative yield within minutes at room temperature. This procedure does not require any water quenches, solvent separations and purification steps such as recrystallization and column chromatography.
Squaric acid as an impressive organocatalyst for Michael addition in water
Azizi, Najmadin,Saki, Elham,Edrisi, Mahtab
experimental part, p. 973 - 977 (2012/05/20)
A simple, green, and environmentally benign protocol for squaric acid (5 mg) catalyst conjugate addition of aromatic amines and thiols to unsaturated carbonyl compounds in water in good to excellent yields is developed. The advantages of low sensitivity toward moisture and oxygen, high tolerance of different functional groups, green reaction media and efficient recyclability make this organocatalyst suitable for both laboratory and industrial scale synthesis of β-substituted carbonyls under very mild conditions.
Straightforward and highly efficient catalyst-free regioselective reaction of thiol to β-nitrostyrene: a concise synthesis of vinyl sulfide and nitro sulfide
Chu, Cheng-Ming,Tu, Zhijay,Wu, Pohsi,Wang, Chieh-Chieh,Liu, Ju-Tsung,Kuo, Chun-Wei,Shin, Yu-Hsuan,Yao, Ching-Fa
experimental part, p. 3878 - 3885 (2009/09/30)
Under catalyst-free reaction conditions, solvent-mediated addition of thiol 2 to β-nitrostyrene 1 proceeded with regioselective control to afford either adduct 3 or vinyl sulfide 4 in good to excellent yield. Thermodynamic and autocatalytic reaction mecha
Green procedure for the synthesis of β-nitro sulfides by Michael addition of thiols to nitroolefins
Hui, Xin-Ping,Yin, Chao,Ma, Jun,Xu, Peng-Fei
experimental part, p. 676 - 690 (2009/07/18)
Michael addition of thiols to nitroolefins was carried out in water at room temperature without any catalyst, and β-nitro sulfides were obtained in excellent yields. This is the first example of Michael addition of thiols to nitroolefins in water without
