Copper-Catalyzed Regio- and Stereoselective Ring-Opening of Cyclic Sulfamidates with Grignard Reagents assisted by Lithium Chloride
作者:Pitchaiah Arigala、Venkata S. Sadu、In-Taek Hwang、Jin-Soo Hwang、Chul-Ung Kim、Kee-In Lee
DOI:10.1002/adsc.201400850
日期:2015.6.15
Copper‐catalyzed ring‐opening reactions of cyclic 1,2‐sulfamidates with a wide range of Grignard reagents have been investigated. The use of lithium chloride as an additive is essential to activate CO bond cleavage. The reaction represents highly regio‐ and stereoselective, and thus allows for efficient synthesis of enantioenriched α‐branched benzylamine derivatives. Furthermore, we demonstrated that
Iridium-Catalyzed Annulation of Aromatic Imines with 1,3-Dienes<i>via</i>Direct Functionalization of an Aromatic CH Bond
作者:Yusuke Ebe、Miyuki Hatano、Takahiro Nishimura
DOI:10.1002/adsc.201401171
日期:2015.5.4
to give 1‐aminoindane derivatives in high yields with high regio‐ and stereoselectivities. The iridium complex coordinated with a substrate 1,3‐diene displayed high catalyticactivity. The reaction proceeds via the direct formation of the aryliridium(I) species from the aromatic aldimine and an iridium(I) acetate species via a concerted metalation‐deprotonation pathway.
One-Pot Highly Diastereoselective Synthesis of <i>cis</i>-Vinylaziridines via the Sulfur Ylide-Mediated Aziridination and Palladium(0)-Catalyzed Isomerization
cis-trisubstituted vinylaziridines containing a quaternary carbon center is realized by a one-pot protocol in which the combination of sulfur ylide-mediated aziridination of cyclic ketimines and Pd(0)-catalyzedisomerization is employed successfully.
Energy-, time-, and labor-saving synthesis of α-ketiminophosphonates: machine-learning-assisted simultaneous multiparameter screening for electrochemical oxidation
作者:Masaru Kondo、Akimasa Sugizaki、Md. Imrul Khalid、H. D. P. Wathsala、Kazunori Ishikawa、Satoshi Hara、Takayuki Takaai、Takashi Washio、Shinobu Takizawa、Hiroaki Sasai
DOI:10.1039/d1gc01583d
日期:——
electrochemical oxidation of α-amino phosphonates with the utilization of machine-learning-assisted simultaneous multiparameter screening. After brief experimental screening, the Bayesian optimization with the experimental data (up to 12 entries) could rapidly predict the optimal conditions for the synthesis of α-ketiminophosphonates and sulfonyl ketimines with aryl and alkyl groups. The obtained α-ketiminophosphonates
Stereoselective synthesis of 1,3-disubstituted isoindolines via Rh(<scp>iii</scp>)-catalyzed tandem oxidative olefination–cyclization of 4-aryl cyclic sulfamidates
作者:Se-Mi Son、Yeon Ji Seo、Hyeon-Kyu Lee
DOI:10.1039/c5cc09888b
日期:——
Rh(III)-catalyzed tandem ortho C-H olefination of cyclic 4-aryl sulfamidates (1) and subsequent intramolecular cyclization is described. This reaction serves as a method for the direct and stereoselectivesynthesis of 1,3-disubstituted...