Enantioselective Syntheses of
<i>Strychnos</i>
and
<i>Chelidonium</i>
Alkaloids through Regio‐ and Stereocontrolled Cooperative Catalysis
作者:Luke S. Hutchings‐Goetz、Chao Yang、James W. B. Fyfe、Thomas N. Snaddon
DOI:10.1002/anie.202005151
日期:2020.9.28
We describe enantioselective syntheses of strychnos and chelidonium alkaloids. In the first case, indole acetic acid esters were established as excellent partner nucleophiles for enantioselective cooperative isothiourea/Pd catalyzed α‐alkylation. This provides products containing indole‐bearing stereocenters in high yield and with excellent levels of enantioinduction in a manner that is notably independent
Chemospecific Cyclizations of α‐Carbonyl Sulfoxonium Ylides on Aryls and Heteroaryls
作者:Daniel Clare、Benjamin C. Dobson、Phillip A. Inglesby、Christophe Aïssa
DOI:10.1002/anie.201910821
日期:2019.11.4
The functionalization of aryl and heteroaryls using α‐carbonylsulfoxoniumylides without the help of a directing group has remained so far a neglected area, despite the advantageous safety profile of sulfoxoniumylides. Described herein are the cyclizations of α‐carbonylsulfoxoniumylides onto benzenes, benzofurans and N‐p‐toluenesulfonyl indoles in the presence of a base in HFIP, whereas pyrroles
Sharma, Prince P.; Roy, Ram K.; Anurag, Asian Journal of Chemistry, 2012, vol. 24, # 7, p. 2878 - 2880
作者:Sharma, Prince P.、Roy, Ram K.、Anurag、Verma, Krishan
DOI:——
日期:——
A Cu(I)-Catalyzed C−H α-Amination of Esters. Direct Synthesis of Hydantoins
作者:Baoguo Zhao、Haifeng Du、Yian Shi
DOI:10.1021/ja802242h
日期:2008.6.1
This paper describes a novel intermolecular alpha-amination process of esters using CuCl as catalyst and di-tert-butyldiaziridinone as nitrogen source. A variety of hydantoins can be formed effectively under mild reaction conditions.