Studies on Phosphoroheterocycle Chemistry III: An Unusual Way to 1,3,2-Thiazaphospholidine-4-thione 2-Sulfide Derivatives
作者:ShengLou Deng、RuYu Chen
DOI:10.1055/s-2002-35619
日期:——
An unusual but efficient method for the synthesis of phosphoroheterocycles, 1,3,2-thiazaphospholidine-4-thione 2-sulfide derivatives, by the reaction of Lawesson'sreagent with a variety of u-hydroxy nitriles has been developed. The possible mechanism of the reaction is proposed to involve thiation of hydroxy group in a first step, sequential addition of P-SH to the nitrile and rearrangement resulting
The simplest synthesis of 5,5-disubstituted and spiranic methyl 4-amino-2,2-dioxo-2,5-dihydro-1,2λ6-oxathiole-3-carboxylates
作者:Alexey V. Dobrydnev、Bohdan V. Vashchenko、Yulian M. Volovenko
DOI:10.1016/j.tetlet.2018.03.029
日期:2018.4
We report the short and the simplest strategy for the synthesis of methyl 4-amino-2,2-dioxo-2,5-dihydro-1,2λ6-oxathiole-3-carboxylates bearing aliphatic substituents at the 5th position. A number of cyanohydrins were forced to react with methyl 2-(chlorosulfonyl)acetate to give the interim methyl 2-[(cyanomethoxy)sulfonyl]acetates that upon Et3N-mediated conditions underwent the CSIC [Carbanion mediated
A method is described for synthesizing succinonitrile derivatives bearing alkyl or aryl substituents from cyanohydrin derivatives using low-valent titanium. The active species in this reaction is proposed to be a resonance hybrid of the TiIV nitrile enolate and TiIII alkyl radical.
描述了一种使用低价钛由氰醇衍生物合成带有烷基或芳基取代基的琥珀腈衍生物的方法。该反应中的活性物质被认为是 Ti IV腈烯醇化物和 Ti III烷基自由基的共振杂化物。
Zur Kenntnis des Kohlenstoffringes. 50. Mitteilung. Über die Abhängigkeit der Dissoziationskonstanten der ringhomologen Cyclanon-cyanhydrine von der Ringgrösse
作者:V. Prelog、Margit Kobelt
DOI:10.1002/hlca.19490320404
日期:——
Es wurden die Dissoziationskonstanten der ringhomologen Cyclanon-cyanhydrinen mit 5 bis 20 Ringgliedern in 96-proz. Alkohol bestimmt.
杂种中的环孢菌素Cyclanon-cyanhydrinen mit 5 bis 20 Ringgliedern在96-proz中。酒精最佳。
Synthesis, spectral, and structural characteristics of cyanohydrines derived from aliphatic cyclic ketones
作者:E. C. Hosten、R. Betz
DOI:10.1134/s1070363214110309
日期:2014.11
A series of cyanohydrines derived from cyclic aliphatic ketones was synthesized by acid-catalyzed nucleophilic addition reaction under the action of potassiumcyanide. The products were characterized by means of multi-nuclear NMR spectroscopy (1H, 13C, 14N, 15N), mass spectrometry, elemental analysis, UV-Vis spectroscopy, refraction index measurements as well as vibrational spectroscopy. The structure