18269-50-6Relevant articles and documents
New methods of synthesis of boron, germanium, and tin derivatives of pentavalent phosphorus thioacids
Nizamov, Il'yas S.,Sorokina, Tat'yana P.,Nizamov, Il'nar D.,Galimullina, Nailya G.,Batyeva, Elvira S.,Alfonsov, Vladimir A.
, p. 27 - 35 (2007/10/03)
The reaction of S-trimethysilyl esters of S-propyl-4-methoxyphenyltrithiophosphonic, bis-(dialkylamido)dithiophosphoric, and S-ethyl-diethylamidotrithiophosphoric acid with trialkyl borates, triorganylbromogermanes, trimethyl(isobutylthio)germane, and tri
New Syntheses of Methyleniminium Salts from Carbonyl Compounds and from α-Chloro Ethers; an Access to Vinylogous Viehe Salts
Schroth, Werner,Jahn, Ullrich,Stroehl, Dieter
, p. 2013 - 2022 (2007/10/02)
Two methods for the synthesis of isolable methyleniminium salts and amidinium salts are presented.In the first case carbonyl compounds A are treated with a mixture of (dialkylamino)trimethylsilane (12) and chlorotrimethylsilane (13) or 12 and trimethylsilyl triflate (14) leading to the iminium chlorides F or iminium triflates G, respectively.With 12/13 the preparation of F is limited to non-enolizable aldehydes and dimethylformamide (10), while 12/14 enables the preparation of G, e.g. 23a-25a, 27a, also with ketones and with substituted amides.The second procedure is based on the treatment of α-chloro ethers L with 12.Both methods afford the Mannich reagent 16a in high yields.By reaction of the α-chloro ether 35 with 12 in diethyl ether the vinylogous Viehe salts 36a-c, e become available for the first time.The reaction pathways are discussed. - Key Words: Methyleniminium salts, preparation, mechanisms of formation / (Dialkylamino)trimethylsilanes / Ethers, α-chloro / Viehe salts, vinylogous
The mechanism of the formation of silyl enol ethers from hydrosilanes and organic carbonyl compounds in the presence of cobalt carbonyls. Kinetic investigation of some reaction steps
Kovács, István,Sisak, Attila,Ungváry, Ferenc,Markó, László
, p. 1025 - 1028 (2008/10/08)
The cleavage of isobutyrylcobalt tetracarbonyl with triethylsilane gives (triethylsilyl)cobalt tetracarbonyl, isobutyraldehyde, dicobalt octacarbonyl, and the corresponding unsaturated and saturated silyl ethers. Silyl enol ether was also formed, along wi
