Switchable Copper-Catalyzed Approach to Benzodithiole, Benzothiaselenole, and Dibenzodithiocine Skeletons
作者:Meng-Qiao Huang、Tuan-Jie Li、Jian-Quan Liu、Andrey Shatskiy、Markus D. Kärkäs、Xiang-Shan Wang
DOI:10.1021/acs.orglett.0c00907
日期:2020.5.1
A copper-catalyzed reaction between 2-bromo-benzothioamides and S8 or Se involving sulfur rearrangement is reported, enabling access to benzodithioles 2 and benzothiaselenoles 6 in the presence of Cs2CO3. In the absence of S8 or Se, the reaction affords dibenzodithiocines 7 via two consecutive C(sp2)-S Ullmann couplings.
A metal‐free cyclization of benzo[c][1,2]dithiol‐3‐ones and amidines is demonstrated herein. Triphenylphosphine was harnessed as the activating reagent to facilitate the ring‐opening of benzo[c][1,2]dithiol‐3‐ones via S‐S bond cleavage. This PPh3‐Promoted cyclization reaction of benzo[c][1,2]dithiol‐3‐ones enabled to forge a diverse array of 1,3‐benzothiazones in good yields with wide substrate scope
Substituent Effects on the Reactivity of Benzo-1,2-dithiolan-3-one 1-Oxides and Their Possible Application to the Synthesis of DNA-Targeting Drugs
作者:Nahed Sawwan、Edyta M. Brzostowska、Alexander Greer
DOI:10.1021/jo0508191
日期:2005.8.1
[GRAPHICS]The efficiency of polysulfane product generation has been investigated for n-propyl thiol reactions with ortho- and para-substituted benzo-1,2-dithiolan-3-one 1-oxides in acetonitrile-water (7:3) mixtures. The reaction is facilitated by reducing the electron density at the para position or by placing substituents bearing lone pair electrons ortho to the dithiolanone-oxide (S1) reaction center. Through-space and through-bond effects both contribute to the conversion of polysulfane products.
Synthesis and Structure of Functionalized Derivatives of the Cleft-Shaped Molecule Dithiosalicylide
作者:Kaushik Mitra、Melissa E. Pohl、Leonard R. MacGillivray、Charles L. Barnes、Kent S. Gates