17964-29-3Relevant articles and documents
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Eaborn,C. et al.
, p. 245 - 252 (1972)
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Synthesis of Di- and Triarylmethanes through Palladium-Catalyzed Reductive Coupling of N -Tosylhydrazones and Aryl Bromides
Xia, Yamu,Hu, Fangdong,Xia, Ying,Liu, Zhenxing,Ye, Fei,Zhang, Yan,Wang, Jianbo
, p. 1073 - 1086 (2017/02/24)
A palladium-catalyzed reductive coupling between N-tosylhydrazones and aryl bromides has been developed. The reaction provides an efficient method for the synthesis of diarylmethanes and triarylmethanes via the formation of C(sp2)-C(sp3) single bonds. This new methodology for the synthesis of diarylmethanes and triarylmethanes is featured by the ready availability of the starting materials, mild reaction conditions, and the tolerance of wide range of functional groups. The reaction follows a pathway including palladium carbene formation, migratory insertion, and reduction of the alkylpalladium(II) intermediate.
ROTATIONAL BARRIERS IN DIPHENYLMETHYL ANIONS STABILIZED BY TRIMETHYLSILYL AND TRICARBONYLCHROMIUM(0) MOIETIES.
Top,Jaouen,Sayer,McGlinchey
, p. 6426 - 6429 (2007/12/18)
A series of diphenylmethyl anions has been prepared in which the phenyl rings bear pi -bonded Cr(CO)//3 groups and/or a trimethylsilyl moiety. Variable-temperature **1**3C NMR studies on these compounds have allowed the evaluation of the barriers to phenyl rotation. It is shown that a pi -bonded Cr(CO)//3 group stabilizes the negative charge much more efficiently than does a p-SiMe//3 functionality. However, when the Me//3Si substituent is bonded directly to the alpha -carbon atom, the charge preferentially resides on the silicon, allowing the ( pi -Cr(CO)//3 minus C//6H//5) groups to rotate apparently unhindered.
