Rhodium-Catalyzed Denitrogenative [2,3] Sigmatropic Rearrangement: An Efficient Entry to Sulfur-Containing Quaternary Centers
作者:Dongari Yadagiri、Pazhamalai Anbarasan
DOI:10.1002/chem.201302653
日期:2013.11.4
blocks: α‐Sulfenylated imines containing a quaternary center, an ubiquitous subunit and excellent building block, were achieved by rhodium‐catalyzed denitrogenative [2,3] sigmatropic rearrangements of N‐sulfonyl‐1,2,3‐triazoles with allylaryl(alkyl) sulfides. Coupling of this methodology with a copper‐catalyzed cycloaddition reaction provides a platform for the direct regioselective functionalization of
Highly efficient catalytic dehydrative S-allylation of thiols and thioic S-acids
作者:Shinji Tanaka、Prasun Kanti Pradhan、Yusuke Maegawa、Masato Kitamura
DOI:10.1039/c0cc00096e
日期:——
A SH-selective allylation method using [CpRu(2-quinolinecarboxylato)(η3-C3H5)]PF6 has been realized in various solvents including aqueous media to give allyl sulfides and allyl S-thioates, demonstrating the potential applicability to lipopeptide chemistry.
Blue‐Light‐Induced Carbene‐Transfer Reactions of Diazoalkanes
作者:Renè Hommelsheim、Yujing Guo、Zhen Yang、Claire Empel、Rene M. Koenigs
DOI:10.1002/anie.201811991
日期:2019.1.21
their chemistry is accessed by the use of transition metal catalysts. Herein, we describe the application of low‐energy blue light for the photochemical generation of carbenes from donor–acceptor diazoalkanes. This catalyst‐free and operationally simple approach enables highly efficient cyclopropenation reactions with alkynes and the rearrangement of sulfides under mild reaction conditions, which can
3]‐sigmatropic rearrangement reaction involving allylic sulfides and diazo reagents (Doyle–Kirmse reaction) is reported. Engineered variants of sperm whale myoglobin catalyze this synthetically valuable C−C bond‐forming transformation with high efficiency and product conversions across a variety of sulfide substrates (e.g., aryl‐, benzyl‐, and alkyl‐substitutedallylic sulfides) and α‐diazo esters. Moreover
Enabling iron catalyzed Doyle–Kirmse rearrangement reactions with in situ generated diazo compounds
作者:Katharina J. Hock、Lucas Mertens、Renè Hommelsheim、Robin Spitzner、Rene M. Koenigs
DOI:10.1039/c7cc02801f
日期:——
Slow addition of sodium nitrite allows the in situ preparation of highly explosive diazo compounds and enables their safe and scalable application in ironcatalyzed rearrangement reactions of allylic and propargylic sulfides. With catalyst loadings as low as 0.1 mol% an effective entry into α-mercapto-nitriles, α-mercapto-esters and α-trifluoromethyl-sulfides on a gram-scale is achieved.