A base induced transformation of a 1,3-dimethyl-1,3-di(1-adamantyl)formamidinium salt into β-[methyl-(1-adamantyl)amino]acrylonitriles in aliphatic nitriles
摘要:
A novel 1,3-dimethyl-1,3-di-(1-adamantyl)formamidinium perchlorate has been prepared via the Vilsmeier-Haack reaction of N-methyl-N-(1-adamantyl)formamide and N-methyl-N-(1-adamantyl) amine in a mixture of phosphorus oxychloride and benzene. The new formamidinium salt was found to undergo addition-elimination reactions when treated with sodium hydride in acetonitrile or propionitrile solution, thereby forming the corresponding beta-[methyl(1-adamantyl)amino]acrylonitriles and N-methyl-N-(1-adamantyl) amine. The H-1 and C-13 NMR spectra and the single-crystal X-ray structure of the new formamidinium salt have been determined along with those of the related compound 1,3-di-(1-adamantyl)-1-cyanoamidine and the corresponding beta-(dialkylamino)acrylonitriles.
Highly efficient carbene and polycarbene catalysis of the transesterification reaction
作者:Konstantin A. Marichev、Nikolai I. Korotkikh、Alan H. Cowley、Vagiz Sh. Saberov、Nataliya V. Glinyanaya、Gennady F. Rayenko、Oles P. Shvaika
DOI:10.24820/ark.5550190.p010.034
日期:——
Highlyefficientcarbene and polycarbenecatalysis of the transesterificationreaction of ethyl benzoate in methanol has been observed and results in values of TON as high as 4000–6150 at a molar ratio of ester to methanol of 1:18 at room temperature. The most effective catalysts were found to be the individual carbenes or in situ generated carbenes, namely adamantyl and aromatic substituted cyclic
Regioselective electrophilic formylation—3-substituted thiophenes as a case study
作者:Otto Meth-Cohn、Mark Ashton
DOI:10.1016/s0040-4039(00)00254-9
日期:2000.4
A variety of methods for regioselective formylation have been examined and exemplified with 3-methylthiophene. Optimal yields and regioselectivity for 2-formylation were obtained with N-formylpyrrolidine (11:1) although up to a 46:1 ratio could be obtained with MeOCHCl2:TiCl4, albeit in lower yield. Optimal 5-formylation (1:1.5) was obtained when using N-formylindoline:(COCl)2.
A base induced transformation of a 1,3-dimethyl-1,3-di(1-adamantyl)formamidinium salt into β-[methyl-(1-adamantyl)amino]acrylonitriles in aliphatic nitriles
作者:Arthur V. Knishevitsky、Nikolai I. Korotkikh、Alan H. Cowley、Jennifer A. Moore、Kalyan V. Vasudevan、Tatyana M. Pekhtereva、Oles P. Shvaika
DOI:10.3998/ark.5550190.0013.207
日期:——
A novel 1,3-dimethyl-1,3-di-(1-adamantyl)formamidinium perchlorate has been prepared via the Vilsmeier-Haack reaction of N-methyl-N-(1-adamantyl)formamide and N-methyl-N-(1-adamantyl) amine in a mixture of phosphorus oxychloride and benzene. The new formamidinium salt was found to undergo addition-elimination reactions when treated with sodium hydride in acetonitrile or propionitrile solution, thereby forming the corresponding beta-[methyl(1-adamantyl)amino]acrylonitriles and N-methyl-N-(1-adamantyl) amine. The H-1 and C-13 NMR spectra and the single-crystal X-ray structure of the new formamidinium salt have been determined along with those of the related compound 1,3-di-(1-adamantyl)-1-cyanoamidine and the corresponding beta-(dialkylamino)acrylonitriles.