Enantioselective Heck-Matsuda Arylations through Chiral Anion Phase-Transfer of Aryl Diazonium Salts
作者:Carolina M. Avila、Jigar S. Patel、Yernaidu Reddi、Masato Saito、Hosea M. Nelson、Hunter P. Shunatona、Matthew S. Sigman、Raghavan B. Sunoj、F. Dean Toste
DOI:10.1002/anie.201702107
日期:2017.5.15
seven‐membered ring alkenes and aryl diazonium salts is presented. High yields and enantioselectivities were achieved using Pd0 and chiral anion co‐catalysts, the latter functioning as a chiral anion phase‐transfer (CAPT) reagent. For certain substrate classes, the chiral anion catalysts were modulated to minimize the formation of undesired by‐products. More specifically, BINAM‐derived phosphoric acid catalysts
Allylic Alkylation and Ring-Closing Metathesis in Sequence: A Successful Cohabitation of Pd and Ru
作者:Claire Kammerer、Guillaume Prestat、Thomas Gaillard、David Madec、Giovanni Poli
DOI:10.1021/ol702694v
日期:2008.2.1
An allylic alkylation/ring-closing metathesis domino catalytic process, wherein a palladium and a ruthenium catalyst are concomitantly present in the reaction mixture from the outset of the reaction, is developed. Evidence for Grubbs' catalysts activity in allylic alkylation is also reported.
Preparation of Seven-Membered Carbocycles Using Ring-Closing Metathesis Reaction and Application to Syntheses of Tormesol and Cyathane Skeleton
作者:Katsuyuki Nakashima、Norihiro Fujisaki、Kosuke Inoue、Atsushi Minami、Chisako Nagaya、Masakazu Sono、Motoo Tori
DOI:10.1246/bcsj.79.1955
日期:2006.12
Various precursors were synthesized and were reacted with the Grubbs reagent as well as the second generation Grubbs reagent to cyclize them into seven-membered carbocycles with di- or tri-substituted double bonds. These reactions were used to synthesize (−)-tormesol, which is an enantiomer of sphenolobane-type diterpene that was isolated from Halimium viscosum, and a basic skeleton of cyathane-type diterpene.