Palladium-Catalyzed Three-Component Carbocarbonation of Arynes: Expeditious Synthesis of <i>o</i>-Alkylated Arylacrylates and Stilbenes
作者:Tuanli Yao、Jiazhe Hui、Tao Liu、Tao Li
DOI:10.1021/acs.joc.0c02994
日期:2021.4.16
A palladium-catalyzed multicomponentreactioninvolving olefin-tethered aryl iodides, arynes, and electrophilic alkenes has been developed for straightforward synthesis of o-alkylated arylacrylates and stilbenes through tandem intramolecular Heck cyclization/aryne dicarbofunctionalization.
New Synthetic Method for Indole-2-carboxylate and Its Application to the Total Synthesis of Duocarmycin SA
作者:Kou Hiroya、Shigemitsu Matsumoto、Takao Sakamoto
DOI:10.1021/ol0489548
日期:2004.8.1
aryl halides and methylpropiolate were investigated. The electron-withdrawing groups on the aromatic ring are essential for producing the methyl indole-2-carboxylate derivatives. On the other hand, the presence of an extra methylpropiolate and Pd(PPh3)4 were required to provide an efficient catalytic system for the cyclization reactions. This reaction was used for the total synthesis of duocarmycin
Highly Enantioselective Synthesis of Chiral 3-Substituted Indolines by Catalytic Asymmetric Hydrogenation of Indoles
作者:Ryoichi Kuwano、Kohei Kaneda、Takashi Ito、Koji Sato、Takashi Kurokawa、Yoshihiko Ito
DOI:10.1021/ol049317k
日期:2004.6.1
text] N-Tosyl 3-substituted indoles were hydrogenated with high enantioselectivities (95-98% ee) by use of a trans-chelating chiral bisphosphine, (S,S)-(R,R)-PhTRAP ligand. The chiral catalyst, which was generated in situ from [Rh(nbd)(2)]SbF(6), PhTRAP, and Cs(2)CO(3), is useful for enantioselectively synthesizing a range of diverse optically active indolines possessing a chiral carbon at the 3-position