Zarkadis, Antonios; Neumann, Wilhelm P.; Duennebacke, Dieter, Chemische Berichte, 1993, vol. 126, # 5, p. 1179 - 1186
作者:Zarkadis, Antonios、Neumann, Wilhelm P.、Duennebacke, Dieter、Penenory, Alicia、Stapel, Ralf、Stewen, Ulrich
DOI:——
日期:——
Barton, Derek H. R.; Chern, Ching-Yuh; Jaszberenyi, Joseph Cs., Australian Journal of Chemistry, 1995, vol. 48, # 2, p. 407 - 426
作者:Barton, Derek H. R.、Chern, Ching-Yuh、Jaszberenyi, Joseph Cs.
DOI:——
日期:——
Thermolysis of Acylazo <i>O</i>-Trimethylsilyl Cyanohydrins: Azoalkanes Yielding Captodatively Substituted Radicals
作者:Charles F. Billera、Travis B. Dunn、David A. Barry、Paul S. Engel
DOI:10.1021/jo981372h
日期:1998.12.1
A new synthetic method has been developed for preparing azoalkanes bearing geminal ol-cyano and alpha-trimethylsiloxy groups. While the symmetrical compound 5 decomposes near room temperature to afford, almost entirely, the C-C dimers, the unsymmetrical azoalkane 3 requires heating to 75 degrees C. The thermolysis activation parameters of 3 and 5 can be rationalized on steric grounds without invoking captodative radical stabilization. A C-13 NMR product study of photolyzed 3 in the presence of TEMPO at 21 degrees C shows that the fate of caged [tert-butyl, 1-trimethylsiloxy-1-cyanoethyl(14)] radical pairs is disproportionation, 17%, cage recombination, 20%, and cage escape, 63%.
A Novel Heterogeneous Synthesis of Acyl Cyanides Catalyzed by PEG400 and Zinc Iodide
作者:Yu‐Qing Cao、Yun‐Fei Du、Bao‐Hua Chen、Ji‐Tai Li
DOI:10.1081/scc-200026646
日期:2004.1.1
Aroyl cyanides were readily synthesized in moderate yields by the cyanation of aroyl chlorides with dry powdered potassium cyanide under the catalysis of PEG400 and zinc iodide in dichloromethane at room temperature. A preliminary study on the one-pot preparation of acetyl cyanide was also reported.