Ringerweiterung von 1,2-Thiazol-3(2<i>H</i>)-on-1,1-dioxiden und 3-Amino-2<i>H</i>-azirinen zu 4<i>H</i>-1,2,5-Thiadiazocin-6-on-1,1-dioxiden
作者:Annette Rahm、Anthony Linden、Beverly R. Vincent、Heinz Heimgartner、Manfred Mühlstädt、Bärbel Schulze
DOI:10.1002/hlca.19910740511
日期:1991.8.7
Ring Enlargement of 1,2-Thiazol-3(2H)-one-1,1-dioxides and 3-Amino-2H-azirines to 4H-1,2,5-Thiadiazocin-6-one-1,1-dioxides
1,2-噻唑-3(2 H)-one-1,1- dioxides和3-Amino-2 H -azirines的环扩大至4 H -1,2,5 - Thiadiazocin -6-one-1,1 -二氧化物
Cyclic and acyclic sulfonimides in reactions with Rh(ii)-ketocarbenoids: a new access to chemoselective O-functionalization of the imidic carbonyl groups
diazomalonic, and diazoacetic esters using dirhodiumtetraacetate in the presence of isothiazol-3(2H)-one 1,1-dioxides and a number of N-(arenesulfonyl)carboxamides in solutions of methylene chloride or dichloroethane gives rise to O-alkylation of the imidic carbonyl groups by Rh(II)-carbenoids and the formation of O-alkylimidates as the final products. The reaction proceeds with high chemoselectivity via
Chemistry of Diazocarbonyl Compounds: XX. Chemoselective O-Alkylation of 3(2H)-Oxoisothiazole-1,1-dioxides
作者:B. Schulze、Vs. V. Nikolaev、L. Hennig、L. L. Rodina、J. Sieler、V. A. Nikolaev
DOI:10.1023/b:rujo.0000043724.25474.51
日期:2004.5
Catalytic decomposition of diazoacetylacetone, ethyl diazoacetate, and diethyl diazomalonate effected by dirhodium tetraacetate in the presence of 3(2H)-oxoisothiazole-1,1-dioxides resulted in O-alkylation of amide carbonyl of the heterocycle affording the corresponding enol ethers in preparative yield. The reaction occurred chemoselectively. The 1,3-dicarbonyl derivatives of 3-hydroxyisothiazole1, 1 -dioxides obtained in contrast to analogous N-alkylated products are not enolized in solutions and in crystals
NG, SEIK WENG;KUTHUBUTHEEN, A. J.;ARIFIN, ZAINUDIN;WEI, CHEN;KUMAR, DAS V+, J. ORGANOMET. CHEM., 403,(1991) N-2, C. 101-109
作者:NG, SEIK WENG、KUTHUBUTHEEN, A. J.、ARIFIN, ZAINUDIN、WEI, CHEN、KUMAR, DAS V+