23523-94-6Relevant articles and documents
Transition metals in organic synthesis. Part 108: First total synthesis of ekeberginine
Thomas, Claudia,Kn?lker, Hans-Joachim
, p. 591 - 593 (2013)
Using a palladium(II)-catalyzed oxidative cyclization and a regioselective nickel-mediated prenylation as key steps, the first total synthesis of the 1-oxygenated carbazole alkaloid ekeberginine has been achieved in six steps and in 63% overall yield.
First total synthesis of murrastifoline B and an improved route to murrastifoline F
B?rger, Carsten,Schmidt, Arndt W.,Kn?lker, Hans-Joachim
, p. 1381 - 1384 (2014)
We report the first total synthesis of murrastifoline B and an improved route to murrastifoline F using a twofold palladium-catalyzed Buchwald-Hartwig amination as key step. The monomeric carbazole and the biaryl precursor are also prepared via palladium-
Synthesis of mukonine and seven further 1-oxygenated carbazole alkaloids
Bringmann, Gerhard,Tasler, Stefan,Endress, Heike,Peters, Karl,Peters, Eva-Maria
, p. 1501 - 1505 (1998)
As an intermediate in the synthesis of seven further 1-oxygenated 3- C1-substituted carbazole alkaloids, mukonine (1) was synthesized in 46% overall yield, starting from indole-3-carbaldehyde (12) with a Horner-Emmons reaction as the crucial st
A new two step route to 1-hydroxy-9H-3-carbazolecarboxylic acid derivatives from 3-formylindole. Application to the synthesis of mukonine
Brenna, Elisabetta,Fuganti, Claudio,Serra, Stefano
, p. 1585 - 1588 (1998)
Carbazole alkaloid mukonine 6b was prepared from 3-formylindole in three steps (32% overall yield). The key step was the base-promoted cyclization of a mixed anhydride of mono ester mono acid 5.
Palladium-Catalyzed Regioselective Synthesis of 1-Hydroxycarbazoles Under Aerobic Conditions
Youn, So Won,Kim, Young Ho,Jo, Yoon Hyung
, p. 462 - 468 (2019/01/04)
A palladium-catalyzed aerobic C?H amidation of N-Ts-2-amino-3′-hydroxylbiaryls has been developed to afford a diverse range of 1-hydroxycarbazoles with high regioselectivity and efficiency. This protocol benefits from operational simplicity, robustness, a
Palladium-Catalyzed Formal [4+2] Cycloaddition of Benzoic and Acrylic Acids with 1,3-Dienes via C—H Bond Activation: Efficient Access to 3,4-Dihydroisocoumarin and 5,6-Dihydrocoumalins
Sun, Youwen,Zhang, Guozhu
, p. 708 - 711 (2018/06/06)
We report a palladium-catalyzed formal intermolecular [4+2] cycloaddition of benzoic and acrylic acids with 1,3-dienes including the stock chemicals 1,3-butadiene and isoprene leading to synthetically useful 3,4-dihydroisocoumarins and 5,6-dihydrocoumalins. Stepwise C—H bond cleavage and annulation are likely involved in the reaction pathway. The synthetic potential of the methodology was demonstrated by two short derivatizations and total synthesis of natural product Clausamine B.
Synthesis of Methylene-Bridged Biscarbazole Alkaloids by using an Ullmann-type Coupling: First Total Synthesis of Murrastifoline-C and Murrafoline-E
Kutz, Sebastian K.,B?rger, Carsten,Schmidt, Arndt W.,Kn?lker, Hans-Joachim
, p. 2487 - 2500 (2016/02/14)
We describe the total synthesis of methylene-bridged biscarbazole alkaloids by using a late-stage Ullmann-type coupling of fully functionalised carbazole subunits. The carbazole derivatives were synthesised via a sequence of palladium(0)- and palladium(II