Development of a Rhodium(II)-Catalyzed Chemoselective C(sp<sup>3</sup>)H Oxygenation
作者:Yun Lin、Lei Zhu、Yu Lan、Yu Rao
DOI:10.1002/chem.201502140
日期:2015.10.12
We report the first example of RhII‐catalyzed chemoselective double C(sp3)Hoxygenation, which can directly transform various toluene derivatives into highly valuable aromatic aldehydes with great chemoselectivity and practicality. The critical combination of catalyst Rh(OAc)2, oxidant Selectfluor, and solvents of TFA/TFAA promises the successful delivery of the oxidation with satisfactory yields
Palladium-Catalyzed Acylation Reactions: A One-Pot Diversified Synthesis of Phthalazines, Phthalazinones and Benzoxazinones
作者:Basuli Suchand、Gedu Satyanarayana
DOI:10.1002/ejoc.201800159
日期:2018.5.24
proceeds through [Pd]‐catalyzed acylation and nucleophilic cyclocondensation with dinucleophilic reagents. This process was based on direct coupling with simple bench‐top aldehydes without the assistance of directing group and without activating the carbonyl group. The process is highly advantageous because it employs simple nitrogen‐based nucleophiles, and non‐toxic and readily accessible aldehydes as the
2-Aroylbenzoyl Serine Proteases: Photoreversible Inhibition or Photoaffinity Labeling?
作者:Paul B. Jones、Ned A. Porter
DOI:10.1021/ja9842518
日期:1999.3.1
an acylthrombin was isolated that showed no lytic activity but which slowly regained activity in pH 7.4 buffer. Irradiation of this acylenzyme with 366 nm light led to an enzyme that showed no gain of lytic activity over time. Incubation of chymotrypsin with 1a−3a and 4 led to acylenzymeswhich showed no activity but which regained activity slowly. Irradiation of these inactive acylenzymes with
zed carbonylations involved either toxic carbon monoxide (CO) gas as carbonylating agent or functional-group-assisted ortho sp2 C–H activation (i.e., ortho acylation) or carbonylation by activation of the carbonyl group (i.e., via the formation of enamines). Contradicting these methods, here we describe an environmentally benign process, [Pd]-catalyzed direct carbonylation starting from simple and