Yang, Weibo published the artcileOrchestrated Triple C-H Activation Reactions Using Two Directing Groups: Rapid Assembly of Complex Pyrazoles, Safety of Tetrakis(acetonitrile)palladium(II) Ditriflate, the publication is Angewandte Chemie, International Edition (2015), 54(8), 2501-2504, database is CAplus and MEDLINE.
A sequential triple C-H activation reaction directed by a pyrazole and an amide group leads to the well-controlled construction of sterically congested dihydrobenzo[e]indazole derivs I [R1 = H, 4-Me, 3-Me, 3,4-diMe, 4-Ph, 4-F, etc.; R2 = Me, (CH2)2Ph, (CH2)3Ph; R3 = Me, Et, iBu, cyclohexylmethyl; R2R3=(CH2)5; R4 = Me, Et]. This cascade reaction demonstrates that the often problematic competing C-H activation pathways in the presence of multiple directing groups can be harvested by design to improve step economy in synthesis. Pyrazole as a relatively weak coordinating group is shown to direct Csp3-H activation for the first time.
Angewandte Chemie, International Edition published new progress about 68569-14-2. 68569-14-2 belongs to nitriles-buliding-blocks, auxiliary class Palladium, name is Tetrakis(acetonitrile)palladium(II) Ditriflate, and the molecular formula is C17H18N2O6, Safety of Tetrakis(acetonitrile)palladium(II) Ditriflate.
Referemce:
https://en.wikipedia.org/wiki/Nitrile,
Nitriles – Chemistry LibreTexts