A selective electrochemical way to functionalized 6H-1,3-thiazines and /or pyrroles.
摘要:
4H-1,3-thiazines, easily prepared from 1-thia-3-azabutadienes, appear electroactive in protic medium. Controlled potential electroreductions of 4H-1,-3-thiazines lead either to substituted 6H-1,3-thiazines or to pyrroles according to the nature of the C-4 substituent and the acidity of the supporting electrolyte.
Electrochemical access to functionalized dihydrothiopyran derivatives. Part 1: electroreduction of tetraactivated 4H-thiopyrans
作者:D. Rondeau、E. Raoult、A. Tallec、S. Sinbandhit、L. Toupet、A. Imberty、J. P. Pradère
DOI:10.1039/p29960002623
日期:——
Electroreduction of tetraactivated 4H-thiopyrans leads selectively to diastereoisomers of dihydrothiopyrans. The relative percentages depend on the experimental conditions (electrolysis in sulfuric medium, ammoniacal buffer). The preferred conformations of the end-products are determined in solid state by X-ray crystallography and in solution by 1H NMR spectroscopy, then compared with molecular modelling
四活化的4 H-硫吡喃的电还原选择性地导致二氢硫吡喃的非对映异构体。相对百分比取决于实验条件(在硫酸介质中电解,氨水缓冲液)。最终产物的优选构型通过X射线晶体学测定为固态,并通过1 H NMR光谱测定为溶液,然后与分子建模结果进行比较。非对映异构体的相对构象及其比例通过1 H NMR光谱确定。
Diels-Alder and retro-Diels-Alder reactions: from N'-(thioacyl)formamidines to thio amide vinylogs
作者:Celestin Tea Gokou、Jean Paul Pradere、Herve Quiniou
DOI:10.1021/jo00209a041
日期:1985.5
Pradere, J. P.; Tonnard, F.; Abouelfida, A., Bulletin de la Societe Chimique de France, 1993, vol. 130, p. 610 - 619
作者:Pradere, J. P.、Tonnard, F.、Abouelfida, A.、Cellerin, C.、Andriamanamihaja, M.、et. al
DOI:——
日期:——
A selective electrochemical way to functionalized 6H-1,3-thiazines and /or pyrroles.
4H-1,3-thiazines, easily prepared from 1-thia-3-azabutadienes, appear electroactive in protic medium. Controlled potential electroreductions of 4H-1,-3-thiazines lead either to substituted 6H-1,3-thiazines or to pyrroles according to the nature of the C-4 substituent and the acidity of the supporting electrolyte.
GOKOU, C. TEA;PRADERE, J. P.;QUINIOU, H., SYNTH. COMMUN., 1986, 16, N 1, 79-83