1-(烯丙氧基)-2-(1-芳基乙烯基)苯和1-(1-芳基乙烯基)-2-(乙烯基氧基)苯的新型可见光介导二氟烷基化合成双-二氟烷基苯并氧杂环庚烷和2 H-开发了色烯。该方法具有反应条件温和、区域选择性好、底物范围广、官能团相容性好、后期修饰等特点。初步机理研究表明,CF 2 CO 2 Et 自由基的生成更容易与芳基的双键发生反应。
Synthesis and Evaluation of the Cytotoxicities of Neoflavenes
作者:Sie-Rong Li、Hsing-Ming Chen、Po-Yuan Chen、Jui-Chi Tsai、Liang-Yeu Chen、Eng-Chi Wang、Yi-Ting Huang、Yun-Chen Wei、Pei-Jung Lu
DOI:10.1002/jccs.200800137
日期:2008.8
The synthesis of neoflavene and neoflavenes with methoxy substituents at different positions are described. As starting materials, various salicylaldehydes were run through sequential reactions such as O-allylation, Grignard reaction, oxidation, Wittig reaction, and ring-closing metathesis to yield the target neoflavenes in good yield. Among the prepared neoflavenes, 7-methoxy-4'-methoxyneoflavene
The hydroarylation reaction of terminal alkynes with arylboronic acidscatalyzed by low (400 ppm) loadings of palladium has been developed. The reaction is broad in scope and high-yielding, even on multi-gram scale. It is suitable for the synthesis of alkenes labeled with deuterium, and for the late-stage modification of bioactive molecules.
A copper-catalyzed trifluoromethylation of benzene-linked 1,7-dienes with 1-trifluoromethyl-1,2-benziodoxole via a radical cascade cyclization process for the synthesis of mono- and bis-trifluoromethylated benzoxepines is developed. The selectivity depends on substituents on the double bond of the allyl group in 1,7-dienes. The large-scale operation and late-stage functionalization of bioactive molecules