Overturning Indolyne Regioselectivities and Synthesis of Indolactam V
摘要:
We report the design and synthesis of an indolyne that displays a reversal in regioselectivity, in both nucleophilic addition and cycloaddition reactions, compared to typical 4,5-indolynes. Our approach utilizes simple computations to predict regioselectivity in reactions of unsymmetrical arynes. With this methodology, novel benzenoid-substituted indoles can be accessed with significant regiocontrol. Furthermore, the technology provides an unconventional tactic for the synthesis of C4-substituted indole alkaloids, as demonstrated by a synthesis of indolactam V.
Pd-Catalyzed Synthesis of Aryl and Heteroaryl Triflones from Reactions of Sodium Triflinate with Aryl (Heteroaryl) Triflates
作者:Lynette A. Smyth、Eric M. Phillips、Vincent S. Chan、José G. Napolitano、Rodger Henry、Shashank Shekhar
DOI:10.1021/acs.joc.5b02523
日期:2016.2.5
A novel method for Pd-catalyzed triflination of aryl and heteroaryl triflates using NaSO2CF3 as the nucleophile is described. The combination of Pd2(dba)3 and RockPhos formed the most effective catalyst. A broad range of functional groups and heteroaromatic compounds were tolerated under the neutral reaction conditions. The order of reactivity ArOTf ≥ ArCl ≥ ArBr is consistent with transmetalation
[EN] SULFONAMIDE DERIVATIVES AS BCL-2-SELECTIVE APOPTOSIS-INDUCING AGENTS FOR THE TREATMENT OF CANCER AND IMMUNE DISEASES<br/>[FR] AGENTS INDUISANT L'APOPTOSE SÉLECTIFS POUR BCL-2 POUR LE TRAITEMENT DU CANCER ET DES MALADIES IMMUNES