Bicyclo[1.1.1]pentane (BCP) replacement as a bioisostere in drug molecules has an influence on their permeability, aqueous solubility and in vitro metabolic stability. Thus, the chemical installation of the BCP unit into a chemical entity remains a significant challenge from a synthetic point of view. Here, we have presented a new approach for the installation of the BCP unit on the xanthate moiety
KETONE-CONTAINING CONTROLLED RADICAL INITIATORS FOR POLYMERIZATION REACTIONS
申请人:3M INNOVATIVE PROPERTIES COMPANY
公开号:US20200369820A1
公开(公告)日:2020-11-26
Controlled radical initiators that are ketone-containing dithiocarbamate or ketone-containing dithiocarbonate compounds are used to form polymeric materials that have a single polymeric block or multiple polymeric blocks. Reaction mixtures containing controlled radical initiators and various ethylenically unsaturated monomers, polymeric materials formed from the reaction mixtures, crosslinkable compositions containing the polymeric materials, crosslinked compositions formed from the crosslinkable compositions, and articles containing the polymeric materials, the crosslinkable compositions, or the crosslinked compositions are provided.
Synthesis of 3-Arylpiperidines by a Radical 1,4-Aryl Migration
作者:Alexandru Gheorghe、Béatrice Quiclet-Sire、Xavier Vila、Samir Z. Zard
DOI:10.1021/ol0503642
日期:2005.4.14
[reaction: see text] A route to 3-arylpiperidines, 3-arylpyridines, and 5-arylpiperidin-2-ones involving a radical 1,4-aryl migration has been explored. The sequence requires a xanthate addition to an N-allylarylsulfonamide, followed by acetylation and treatment with dilauroyl peroxide to give the 1,4-aryl transfer product, which upon acidic hydrolysis affords the desired piperidine derivative.
Synthesis of substituted 3-arylpiperidines and 3-arylpyrrolidines by radical 1,4 and 1,2-aryl migrations
作者:Alexandru Gheorghe、Béatrice Quiclet-Sire、Xavier Vila、Samir Z. Zard
DOI:10.1016/j.tet.2007.04.091
日期:2007.7
A route to 3-arylpiperidines and 3-arylpyrrolidines involving radical 1,4- and 1,2-aryl migrations has been explored. For the piperidines, the first route requires a xanthate addition to an N-allylarylsulfonamide, followed by acetylation and treatment with lauroyl peroxide to give the corresponding 1,4-aryl transfer product. This compound can be converted into the desired piperidine derivative following
Free-radical three-component carboalkynylation and -alkenylation of olefins have been developed. These involve the addition, across the double bond of an unactivated olefin, of a radical species α- to an electron-withdrawing group and an alkenyl or alkynyl moiety, derived from the corresponding sulfones.