Acyl Cyanides as Bifunctional Reagent: Application in Copper-Catalyzed Cyanoamidation and Cyanoesterification Reaction
作者:Zhengwang Chen、Xiaowei Wen、Weiping Zheng、Ruolan He、Dou Chen、Dingsheng Cao、Lipeng Long、Min Ye
DOI:10.1021/acs.joc.9b03500
日期:2020.4.17
Cu-catalyzed domino decyanation and cyanation reaction of acyl cyanides with amines or alcohols have been developed. The cyanosources were generated in situ via C–CN cleavage yielding the corresponding cyano substituted amides or esters in moderate to excellent yields. This approach features a cheap copper catalyst, domino decyanation and cyanation reaction, readily available starting materials, broad
The synthesis of 2,4-disubstituted quinazolines by a palladium-catalyzed reaction of arylboronic acids with N-(2-cyanoaryl)benzamides has been developed with moderate to excellent yields. The method shows good functional group tolerance. In particular, halogen and hydroxyl substituents, which are amenable for further synthetic elaborations, are well tolerated. Moreover, the present synthetic route
Smyth, Richard M.; Williams, Andrew, Journal of the Chemical Society. Perkin transactions II, 1993, # 11, p. 2171 - 2174
作者:Smyth, Richard M.、Williams, Andrew
DOI:——
日期:——
Mechanism of Alkaline Cyclization of 2-(Substituted benzamido)benzamides to 4-Quinazolinones
作者:Barry Gardner、Angeline J. S. Kanagasooriam、Richard M. Smyth、Andrew Williams
DOI:10.1021/jo00100a026
日期:1994.10
The title amides cyclize rapidly to the corresponding quinazolin-4-ones in aqueous alkaline solution at 25 degrees C; the pseudo-first-order rate constants fit the empirical equation k(obs) = k(max) [OH-]/K-m + [OH-] + [OH-]K-2(m')) where K-m' is essentially zero for all except the 4-nitro species. The value of K-m measures the ionization of the neutral amide 1 to nonproductive conjugate base 2. Studies of the cyclization in alkali of 2-benzamido-N-methylbenzamide (1i) and 2-(N-methylbenzamido)benzamide (1j) indicate that 7 carries over 99% of the reaction flux and that the tautomer 8 does not contribute significantly. The ratio k(max)/K-m, is a composite rate constant first order in 1 and first order in [OH-]. The value of the Hammett rho for k(max)/K-m (0.67) is consistent with the above scheme where decomposition of 7 is rate limiting.
Synthesis of 2-Aminobenzonitriles through Nitrosation Reaction and Sequential Iron(III)-Catalyzed C–C Bond Cleavage of 2-Arylindoles
作者:Wei-Li Chen、Si-Yi Wu、Xue-Ling Mo、Liu-Xu Wei、Cui Liang、Dong-Liang Mo
DOI:10.1021/acs.orglett.8b01294
日期:2018.6.15
were prepared from 2-arylindoles in good to excellent yields through tert-butylnitrite (TBN)-mediated nitrosation and sequential iron(III)-catalyzed C–C Bond cleavage in a one-pot fashion. The 2-aminobenzonitriles can be used to rapidly synthesize benzoxazinones by intramolecular condensation. The present method features an inexpensive iron(III) catalyst, gram scalable preparations, and novel C–C bond