Electrophilicities of α-Chlorinating Agents Used in Organocatalysis
摘要:
Kinetics of the reactions of the chlorinating agents 1a-c with pi-nucleophiles have been studied to include these compounds in our comprehensive electrophilicity scale.
Structure–Nucleophilicity Relationships for Enamines
作者:Bernhard Kempf、Nathalie Hampel、Armin R. Ofial、Herbert Mayr
DOI:10.1002/chem.200204666
日期:2003.5.23
acetals) and carbanions. It is shown that the nucleophilic reactivities of enamines cover more than ten orders of magnitude, comparable to enol ethers on the low reactivity end and to carbanions on the high reactivity end. Since the products of N-attack are thermodynamically less stable than the reactants, the observed rate constants refer to the formation of the carbon bond;carbon bonds. In some cases
Bonsignore; Loy; Cottiglia, Il Farmaco, 1997, vol. 52, # 11, p. 663 - 666
作者:Bonsignore、Loy、Cottiglia
DOI:——
日期:——
A Highly Effective Catalyst System for the Pd-Catalyzed Amination of Vinyl Bromides and Chlorides
作者:Chinta Reddy Venkat Reddy、Sameer Urgaonkar、John G. Verkade
DOI:10.1021/ol051612x
日期:2005.9.1
A highly efficient synthesis of enamines and imines by Pd-catalyzed amination of vinyl bromides or chlorides with amines is described using the Pd-2(dba)(3)/P(i-BuNC2CH2)(3)N catalyst system.
Electrophilicities of α-Chlorinating Agents Used in Organocatalysis
作者:Xin-Hua Duan、Herbert Mayr
DOI:10.1021/ol100592j
日期:2010.5.21
Kinetics of the reactions of the chlorinating agents 1a-c with pi-nucleophiles have been studied to include these compounds in our comprehensive electrophilicity scale.
(<i>t</i>-Bu)<sub>2</sub>PNP(<i>i</i>-BuNCH<sub>2</sub>CH<sub>2</sub>)<sub>3</sub>N: New Efficient Ligand for Palladium-Catalyzed C−N Couplings of Aryl and Heteroaryl Bromides and Chlorides and for Vinyl Bromides at Room Temperature
作者:Ch. Venkat Reddy、Jesudoss V. Kingston、John G. Verkade
DOI:10.1021/jo702367k
日期:2008.4.1
chlorides possessing base-sensitive substituents (nitro, ester, and keto) provide coupling products with bulky aryl amines in good to excellent yields. Aryl halides possessing other functional groups including cyano, amino, trifluoromethyl, and phenol, coupled with equal ease, producing highly functionalized amines in good to excellent yields. Moreover, an aryl chloro group can be preserved in the presence