Palladium-Catalyzed Domino C–S Coupling/Carbonylation Reactions: An Efficient Synthesis of 2-Carbonylbenzo[<i>b</i>]thiophene Derivatives
作者:Fanlong Zeng、Howard Alper
DOI:10.1021/ol200880m
日期:2011.6.3
A facile and selective palladium-catalyzeddomino procedure has been developed for the preparation of 2-carbonylbenzo[b]thiophene derivatives from 2-gem-dihalovinylthiophenols. This protocol involves intramolecular C–S coupling/intermolecular carbonylation cascade sequences and allows access to various highly functionalized benzo[b]thiophenes in moderate yields.
一种简便的和选择性的钯催化的多米诺程序已被开发用于2- carbonylbenzo [制备b ]从2-噻吩衍生物宝石-dihalovinylthiophenols。该方案涉及分子内C–S偶联/分子间羰基化级联序列,并允许以中等收率获得各种高度官能化的苯并[ b ]噻吩。
Efficient Synthesis of Benzothiophenes by an Unusual Palladium-Catalyzed Vinylic CS Coupling
作者:Christopher S. Bryan、Julia A. Braunger、Mark Lautens
DOI:10.1002/anie.200902843
日期:2009.9.7
construction of a CS and a CC bond under catalytic conditions forms the basis of an efficient route to diversely functionalized benzothiophenes from gem‐dihalovinyl thiophenols. The CC bond can be formed in this tandem catalytic process with an organoboron reagent as shown in the scheme (R1=H, Me, F, Cl, Br, OCH2O; R2=H, Me; R3=aryl, heteroaryl, alkenyl, alkyl), or by Heck or Sonogashira coupling with an
同时施工一个C S和一个C 催化条件下C键形成从不同地官能化的苯并噻吩的高效路由的基础宝石-dihalovinyl苯硫酚。与c 可以在此串联与有机硼试剂催化工艺来形成C键为显示在方案(R 1 = H中,Me,F,氯,溴, OCH 2 ö ; R 2 = H中,Me; R 3=芳基,杂芳基,烯基,烷基),或通过Heck或Sonogashira与烯烃或炔烃偶联。
Intramolecular cross-coupling of gem-dibromoolefins: a mild approach to 2-bromo benzofused heterocycles
作者:Stephen G. Newman、Valentina Aureggi、Christopher S. Bryan、Mark Lautens
DOI:10.1039/b912093a
日期:——
Highly useful halogenated benzofurans and benzothiophenes are prepared from readily available gem-dibromoolefins using a mild, ligand-free copper catalyzed cross-coupling procedure.