Palladium-Catalyzed Regioselective Synthesis of 3-Arylindoles from <i>N</i>
-Ts-Anilines and Styrenes
作者:So Won Youn、Tae Yun Ko、Young Ho Jang
DOI:10.1002/anie.201702205
日期:2017.6.1
A Pd-catalyzed intermolecular oxidative annulation between N-Ts-anilines and styrenes was developed. This method offers a straightforward and robust approach to a wide range of 3-arylindoles using readily available starting materials with good functional-group tolerance and high regioselectivity and efficiency. Further elaboration of the products obtained from this process provided access to highly
Silver(I)-Mediated CH Amination of 2-Alkenylanilines: Unique Solvent-Dependent Migratory Aptitude
作者:So Won Youn、Tae Yun Ko、Min Jung Jang、Su San Jang
DOI:10.1002/adsc.201400759
日期:2015.1.12
A highly effective silver(I)‐mediated CHamination of 2‐alkenylanilines has been developed to afford a diverse range of substituted indoles. High functional group tolerance, broad substrate scope, simple/fast/high‐yielding reaction, and recovery/reuse of the inexpensive silver oxidant are noteworthy. Furthermore, an uncommon migratory process of β‐monosubstituted 2‐alkenylanilines with solvent‐dependence
Palladium-Catalyzed Sequential Vinylic C–H Arylation/Amination of 2-Vinylanilines with Aryl boronic Acids: Access to 2-Arylindoles
作者:Ruixia Yu、Dejun Li、Fanlong Zeng
DOI:10.1021/acs.joc.7b02728
日期:2018.1.5
A palladium-catalyzed selective and successive vinylic C–H arylation/amination of 2-vinylanilines with arylboronic acids to generate indoles has been developed. This procedure represents a straightforward and practical approach to valuable multifunctionalized indoles.
attractive approach to valuable yet synthetically challenging benzo[b]azepines was established via palladium(II)/Lewis acid cocatalyzed oxidative [5 + 2] annulation of readily available 2-alkenylanilines and propargylic esters. The protocol features mild reaction conditions and good functional group tolerance, constituting an array of benzo[b]azepines in yields of 30–75%.
通过钯(II)/路易斯酸共催化易得的2-烯基苯胺和炔丙基酯的氧化[5 + 2]环氧化反应,建立了一种有价值的但对合成具有挑战性的苯并[ b ]氮杂苯的有吸引力的方法。该方案具有温和的反应条件和良好的官能团耐受性,构成了一系列苯并[ b ]氮杂s,产率为30–75%。
Catalytic asymmetric hydrogenation of indoles using a rhodium complex with a chiral bisphosphine ligand PhTRAP
作者:Ryoichi Kuwano、Manabu Kashiwabara、Koji Sato、Takashi Ito、Kohei Kaneda、Yoshihiko Ito
DOI:10.1016/j.tetasy.2006.01.016
日期:2006.2
Highly enantioselective hydrogenation of N-protected indoles was successfully developed by use of the rhodium catalyst generated in situ from [Rh(nbd)2]SbF6 and the chiralbisphosphine PhTRAP, which can form a trans-chelate complex with a transition metal atom. The PhTRAP–rhodium catalyst required a base (e.g., Cs2CO3) for the achievement of high enantioselectivity. Various 2-substituted N-acetylindoles
通过使用由[Rh(nbd)2 ] SbF 6原位生成的铑催化剂和手性双膦PhTRAP,可以成功地开发出N-保护的吲哚的高度对映选择性氢化反应,可以与过渡金属原子形成反式-螯合物。PhTRAP-铑催化剂需要碱(例如Cs 2 CO 3)才能实现高对映选择性。将各种2-取代的N-乙酰吲哚转化为具有高达95%ee的相应的手性二氢吲哚。3-取代的N - tosylindoles的氢化产生二氢吲哚,其在3-位具有立体异构中心,具有高的对映异构体过量(至多98%ee)。