Reported is a novel palladium(II)‐initiated Catellani‐type reaction that utilizes widely accessible aryl boronic acids as the substrates instead of aryl halides, thereby greatly expanding the existing scope of this powerful transformation. This borono‐Catellani reaction was promoted by cooperative catalysis between Pd(OAc)2 and the inexpensive 5‐norbornene‐2‐carbonitrile. Practicality is the striking
Total synthesis of phenanthroquinolizidine alkaloid cryptopleurine was achieved in 8 steps from commercially available 2-pyridinecarboxaldehyde and the epoxide derived from methyleugenol. The key intermediate vinyl triflate enables the divergent synthesis of cryptopleurine derivatives by late-stage installation of various substituents on the C-ring.
从市售的 2-吡啶甲醛和衍生自甲基丁香酚的环氧化物分 8 步完成了菲并喹啉生物碱的全合成。关键的中间体三氟甲磺酸乙烯酯通过后期在 C 环上安装各种取代基,实现了隐蓬碱衍生物的不同合成。
Facile Cyclization of Terphenyl to Triphenylene: A New Chemodosimeter for Fluoride Ions
作者:Vandana Bhalla、Hardev Singh、Manoj Kumar
DOI:10.1021/ol902861b
日期:2010.2.5
Terphenyl derivatives 3 and 4 having OTBS groups have been synthesized via a Suzuki-Miyura coupling reaction, These compounds undergo unprecedented irreversible cyclization to symmetrically/unsymmetrically substituted triphenylenes while carrying out the deprotection of OTBS groups using tetrabutylammonium fluoride. Terphenyl 3 also serves as a new chemodosimeter for fluoride ions.
Synthesis of (S)-(−)-N-acetylcolchinol using intramolecular biaryl oxidative coupling
作者:Gilbert Besong、Krzysztof Jarowicki、Philip J. Kocienski、Eric Sliwinski、F. Thomas Boyle
DOI:10.1039/b603857c
日期:——
An asymmetric synthesis of the tubulin polymerisation inhibitor (S)-(-)-N-acetylcolchinol is reported based on an intramolecular biaryl oxidativecoupling of a 1,3-diarylpropyl acetamide intermediate using phenyliodonium bis(trifluoroacetate) as the final step. Three syntheses of the penultimate 1,3-diarylpropyl acetamide intermediate (S)-(-)-N-[1-[3-(tert-butyldimethylsilyloxy)phenyl)]-3-(3,4,5-trimethoxyphenyl)pr
Dual Photochemical H‐Atom Transfer and Cobalt Catalysis for the Desaturative Synthesis of Phenols from Cyclohexanones
作者:Henry P. Caldora、Zhenhua Zhang、Michael J. Tilby、Oliver Turner、Daniele Leonori
DOI:10.1002/anie.202301656
日期:2023.6.19
Synergistic photocatalytic H-atom transfer and cobalt dual catalysis enables the desaturative synthesis of phenols fromcyclohexanone derivatives by formal removal of four H-atoms.