An Oxidative Intramolecular Phenolic Coupling Reaction for the Synthesis of Amaryllidaceae Alkaloids Using a Hypervalent Iodine(III) Reagent
摘要:
The oxidative intramolecular phenolic coupling reaction of norbelladine derivatives (1) was investigated with the aim of preparing amaryllidaceae alkaloids. Spirodienone compounds (2), which are intermediates for the synthesis of an amaryllidaceae alkaloid, (+)-maritidine, or phenol ether derivatives containing the 5,6,7,8-tetrahydrobenzazocine systems (9), were selectively obtained by the reaction of 1 and the hypervalent iodine(III) reagent, phenyliodine(III) bis(trifluoroacetate) (PIFA). Both p-p' coupling (11) and p-o' coupling spirodienone compounds (12) were obtained by the reaction of phenol derivatives having an alkoxy group at the C-3' position (10) with PIFA.
Maritidine can be readily obtained from the corresponding protected beta, gamma-unsaturated ketone. The quaternary carbon of maritidine was created for the first time via an intramolecular Heck reaction.
A New H<sub>2</sub>O<sub>2</sub>/Acid Anhydride System for the Iodoarene-Catalyzed C−C Bond-Forming Reactions of Phenols
作者:Toshifumi Dohi、Yutaka Minamitsuji、Akinobu Maruyama、Satoshi Hirose、Yasuyuki Kita
DOI:10.1021/ol801321f
日期:2008.8.21
We have succeeded in the first versatile iodoarene-catalyzed C-C bond-forming reactions by development of a new reoxidation system at low temperatures using stoichiometric bis(trifluoroacetyl) peroxide A in 2,2,2-trifluoroethanol (TFE). The catalytic system supplies a wide range of substrates and functional availabilities sufficient to be used in the key synthetic process of producing biologically important Amaryllidaceae alkaloids.
Concise Total Synthesis of (±)-Maritidine
作者:Claire Bru、Claude Thal、Catherine Guillou
DOI:10.1021/ol0343358
日期:2003.5.1
Maritidine can be readily obtained from the corresponding protected beta, gamma-unsaturated ketone. The quaternary carbon of maritidine was created for the first time via an intramolecular Heck reaction.
An Oxidative Intramolecular Phenolic Coupling Reaction for the Synthesis of Amaryllidaceae Alkaloids Using a Hypervalent Iodine(III) Reagent
作者:Yasuyuki Kita、Takeshi Takada、Michiyo Gyoten、Hirofumi Tohma、Meinhart H. Zenk、Jörg Eichhorn
DOI:10.1021/jo9606766
日期:1996.1.1
The oxidative intramolecular phenolic coupling reaction of norbelladine derivatives (1) was investigated with the aim of preparing amaryllidaceae alkaloids. Spirodienone compounds (2), which are intermediates for the synthesis of an amaryllidaceae alkaloid, (+)-maritidine, or phenol ether derivatives containing the 5,6,7,8-tetrahydrobenzazocine systems (9), were selectively obtained by the reaction of 1 and the hypervalent iodine(III) reagent, phenyliodine(III) bis(trifluoroacetate) (PIFA). Both p-p' coupling (11) and p-o' coupling spirodienone compounds (12) were obtained by the reaction of phenol derivatives having an alkoxy group at the C-3' position (10) with PIFA.