CH/NOfunctionalizations by cobalt(III) catalysis allowed the expedient synthesis of a broad range of isoquinolines. Thus, internal and challenging terminal alkynes proved to be viable substrates for an isohypsic annulation, which was shown to proceed by a facile CH cobaltation.
Ç H /Ñ ö官能化由钴(III)催化使范围广泛的异喹啉的的适宜的合成。因此,内部和具有挑战性的末端炔烃被证明是一个isohypsic环,其通过示出一个浅显下进行可行的基板 ħcobaltation。
Easy access to synthesize isoquinolines from aryl ketoximes and internal alkynes via Iridium (III)-catalyzed C H/N O bond activation
作者:Wei Lin、Xiu-Xiu Hu、Cang-Wei Zhuang、Ya-Zhen Wang
DOI:10.1016/j.tet.2019.04.039
日期:2019.5
A highly efficient approach to synthesize isoquinoline derivatives through Iridium(III)-catalyzed cyclization of aryl ketoximes and internal alkynes without oxidant is reported. A broad range isoquinolines are obtained in good to excellent yields and various functional groups are well tolerated.
Easy Access to Isoquinolines and Tetrahydroquinolines from Ketoximes and Alkynes via Rhodium-Catalyzed C−H Bond Activation
作者:Kanniyappan Parthasarathy、Chien-Hong Cheng
DOI:10.1021/jo902084j
日期:2009.12.18
herein is a convenient and highly regioselective synthesis of substituted isoquinoline derivatives from various aromatic ketoximes and alkynes via a one-pot, rhodium-catalyzed C−H bondactivation. In addition, tetrahydroquinoline derivatives are formed in good yields from 2-arylidene-1-cyclohexanone oximes possessing an exocyclic double bond and from tetrahydroxanthone oximes. A possible mechanism is
An efficient and mechanistically interesting method for the synthesis of highly substituted isoquinolines by a Rh(III)-catalyzed hydrazone directed ortho C H bond activation and annulation without an external oxidant is described. This reaction is accomplished via a C-C and C-N bond formation along with N-N bond cleavage.