21205-07-2Relevant academic research and scientific papers
On the development of a nucleophilic methylthiolation methodology
Carvalho, Bernardo Basbaum Portinho De Puga,Amaral, Adriane Antonia Pereira,De Castro, Pedro P?ssa,Ferreira, Fernanda Cerqueira Moreira,Horta, Bruno Araújo Cautiero,Amarante, Giovanni Wilson
, p. 5420 - 5426 (2020/08/03)
Methylthiolation reactions are usually explored to access organosulfur compounds using methanethiol, an extremely flammable and toxic compound. Herein, methylthiomethyl esters were successfully applied as novel methylthiolation reagents in a low cost, transition-metal-free methodology. These reagents allowed the methylthiolation of a wide scope of chalcones, acyl ester derivatives and Morita-Baylis-Hillman acetates with good group tolerance, affording the methylthiolated products in moderate to excellent yields. The reaction mechanism was investigated through several control experiments, as well as by theoretical calculations employing Density Functional Theory. The results strongly support that a sulfurane and a sulfonium ylide appear as key intermediates and that a Pummerer type rearrangement is also crucial for the formation of this novel reagent. Furthermore, the methylthiolation mechanism is likely to proceed through the nucleophilic attack of the reagent, followed by an entropically favoured step involving the acetate attack to the positively charged species, then releasing the product. This journal is
Methylsulfenylation of Electrophilic Carbon Atoms: Reaction Development, Scope, and Mechanism
Pereira, Adriane A.,Pereira, Amanda S.,de Mello, Amanda C.,Carpanez, Arthur G.,Horta, Bruno A. C.,Amarante, Giovanni W.
supporting information, p. 1578 - 1582 (2017/04/06)
An innovative method for the methylsulfenylation of electrophilic carbons was explored. Cheap and commercially available dimethyl sulfoxide (DMSO) was used as a source of the –SCH3 group. Chalcone, dibenzylideneacetone, and Morita–Baylis–Hillma
Design and synthesis of 1,3-biarylsulfanyl derivatives as new anti-breast cancer agents
Kumar, Atul,Tripathi, Vishwa Deepak,Kumar, Promod,Gupta, Lalit Prakash,Akanksha,Trivedi, Ritu,Bid, Hemant,Nayak,Siddiqui, Jawed A.,Chakravarti, Bandana,Saxena, Ruchi,Dwivedi, Anila,Siddiquee,Siddiqui,Konwar, Rituraj,Chattopadhyay, Naibedya
, p. 5409 - 5419 (2011/10/31)
A new series of 1,3-biarylsulfanyl derivatives (homodibenzyl core motif) have been designed and synthesized as new estrogen receptor ligands by chopping benzothiophene core of raloxifene to engender seco-raloxifene scaffold. All the synthesized compounds were screened for anti-proliferative, anti-osteoporotic, and anti-implantation activity. Compounds (35, 36) having basic amino anti-estrogenic side chain were exhibiting potential anti-proliferative activity in MCF-7, MDA-MB-231 and ishikawa cell lines. Some of the synthesized compounds having homodibenzyl motif (5, 8, 10) have shown moderate anti-osteoporotic activity.
Thia-Michael addition reactions using 2-[bis(alkylthio)methylene]-3-oxo-N- o-tolylbutanamides as odorless and efficient thiol equivalents
Dong, Dewen,Yu, Haifeng,Ouyang, Yan,Liu, Qun,Bi, Xihe,Lu, Yumei
, p. 283 - 287 (2007/10/03)
A series of 2-[bis(alkylthio)methylene]-3-oxo-N-o-tolylbutanamides 1 have been investigated as nonthiolic and odorless thiol equivalents in thia-Michael addition reactions. The cleavage of compounds 1 is initiated by NaOH in EtOH; the in situ generated th
Oxidative Generation of Thioalkyl Cations from 2-Tributylstannyl-1,3-dithianes and 1-(Tributylstannyl)alkyl Sulfides and Their Reactions with Olefinic Nucleophiles
Narasaka, Koichi,Arai, Noriyoshi,Okauchi, Tatsuo
, p. 2995 - 3003 (2007/10/02)
2-Tributylstannyl-1,3-dithianes and 1-(tributylstannyl)alkyl sulfides are oxidized with ammonium hexanitratocerate(IV) or ferrocenium hexafluorophosphate to generate their cation radicals, which dissociate into the carbocations and tributylstannyl radical
