High Temperature Metalation of Functionalized Aromatics and Heteroaromatics using (tmp)<sub>2</sub>Zn·2MgCl<sub>2</sub>·2LiCl and Microwave Irradiation
作者:Stefan Wunderlich、Paul Knochel
DOI:10.1021/ol802118e
日期:2008.10.16
heteroaryl zinc reagents were efficiently prepared in THF via direct zincation using (tmp)2Zn x 2MgCl2 x 2LiCl and microwave irradiation. Ester and cyano functions as well as ketones are compatible with the high temperatures of the zincation. The resulting bis-organo zinc species undergo a number of subsequent reactions leading to highly functionalized aromatics and heteroaromatics in good to excellent yields
通过使用(tmp)2Zn x 2 MgCl2 x 2 LiCl进行直接锌化和微波辐射,可以在THF中有效地制备各种多官能芳基和杂芳基锌试剂。酯和氰基官能团以及酮与锌的高温相容。所得的双有机锌物质进行了许多后续反应,从而以良好或优异的收率得到高度官能化的芳族化合物和杂芳族化合物。
(3 + 3) Annulation of Nitroallylic Acetates with Stabilized Sulfur Ylides for the Synthesis of 2-Aryl Terephthalates
作者:Lakshminarayana Satham、Irishi N. N. Namboothiri
DOI:10.1021/acs.joc.8b00917
日期:2018.8.17
A novel (3 + 3) annulation approach has been developed for the synthesis of 2-aryl terephthalates from nitroallylic acetates and stabilized sulfurylides. The 2-aryl terephthalates, which are also biaryls bearing a terephthalate moiety, are formed through a cascade of reactions such as a γ-selective SN2′ reaction, γ-selective intramolecular Michael addition, and two eliminations in the presence of