upon β-elimination, so the fluorescence decrease is an indicator of the reaction yield. Thus, the enantioselectivity of kineticresolutioncatalysts can be assessed simply by measuring the fluorescence intensities of the reaction mixtures of the two enantiomers; it is not necessary to purify the product. This fluorescence probe revealed that benzotetramisole is a superior catalyst for kinetic resolution
Chiral Au<sup>I</sup>
- and Au<sup>III</sup>
-Isothiourea Complexes: Synthesis, Characterization and Application
作者:Danila Gasperini、Mark D. Greenhalgh、Rehan Imad、Shezaib Siddiqui、Anum Malik、Fizza Arshad、Muhammad Iqbal Choudhary、Abdullah M. Al-Majid、David B. Cordes、Alexandra M. Z. Slawin、Steven P. Nolan、Andrew D. Smith
DOI:10.1002/chem.201804653
日期:2019.1.18
organocatalysis and goldcatalysis, the formation of gold‐isothiourea complexes was observed. These novel gold complexes were formed in high yield and were found to be air‐ and moisture stable. A series of neutral and cationic chiral gold(I) and gold(III) complexes bearing enantiopure isothiourea ligands was therefore synthesized and fully characterized. The steric and electronicproperties of the isothiourea
The scalable, chromatography-free synthesis of the chiral isothiourea benzotetramisole (BTM) in two steps from commercially available materials is presented. A detailed procedure for the synthesis of both enantiomers and the racemate on ca. 10 gram scale is disclosed.
J. Org. Chem. 2012, 77, 4885-4901
作者:
DOI:——
日期:——
In Situ Activation of Disulfides for Multicomponent Reactions with Isocyanides and a Broad Range of Nucleophiles
作者:Xiaofang Lei、Yuanyuan Wang、Erkang Fan、Zhihua Sun
DOI:10.1021/acs.orglett.9b00275
日期:2019.3.1
Activation of disulfides with N-halogen succinimide in the presence of TEMPO allows insertion reaction by an isocyanide, the product of which can further accept a wide range of nucleophiles for the generation of isothioureas and related molecular moieties. This new procedure overcomes previous methods that accept essentially only aryl amines as the third nucleophilic component. The diverse nucleophiles