Diazirines in carbenoid reactions catalyzed by rhodium(II) carboxylates
作者:Michael P. Doyle、Kenneth G. High、Su-Min Oon、Antonio K. Osborn
DOI:10.1016/s0040-4039(00)99399-7
日期:1989.1
Diazo compounds formed by thermal or photolytic rearrangement of 3-alkyl-3-phenyl-diazirines in the presence of catalytic amounts of rhodium(II) perfluorobutyrate are effectively directed to metal carbenoid products with minimal competition from processes which are dominant when the diazo compound is used directly or when the diazirine is decomposed in the absence of the catalyst.
Complexes of cyclomaltoheptaose with aromatic diazo compounds: Formation and reactions
作者:Christopher J. Abelt、Jonathan S. Lokey、Shelley H. Smith
DOI:10.1016/0008-6215(89)85172-9
日期:1989.10
Pyrolysis of the relatively stable, solid complexes of cyclomaltoheptaose (β-cyclodextrin) with phenyldiazomethane, 1-diazo-1-phenylethane, and diazo-(diphenyl)methane results in degradation of the labile guests. The host matrix exerts “reaction-vessel” and “shape-selectivity” effects upon the reaction pathways of the guests and derivatives. The carbene insertion reaction with the β-cyclodextrin hydroxyl groups
Straightforward Reductive Esterification of Carbonyl Compounds with Carboxylic Acids through Tosylhydrazone Intermediates
作者:Angel-Humberto García-Muñoz、María Tomás-Gamasa、M. Carmen Pérez-Aguilar、Erick Cuevas-Yañez、Carlos Valdés
DOI:10.1002/ejoc.201200647
日期:2012.7
The reaction of carboxylicacids with tosylhydrazones in basic media gives rise to the corresponding esters through an O–H insertion reaction in the in situ generated diazo compound. The process is operationally very simple, catalyst free, and very general with regard to the structure of both coupling partners. In particular, the esterification can be accomplished by employing tosylhydrazones derived
Synthesis and esterification reactions of aryl diazomethanes derived from hydrazone oxidations catalyzed by TEMPO
作者:Carolina Perusquía-Hernández、Gonzalo R. Lara-Issasi、Bernardo A. Frontana-Uribe、Erick Cuevas-Yañez
DOI:10.1016/j.tetlet.2013.04.079
日期:2013.6
Diverse hydrazones were oxidized to the corresponding diazoalkanes using sodium hypochlorite in the presence of catalytic amounts of TEMPO (2,2,6,6-tetramethylpiperidinyloxy). A library of diverse benzhydryl esters and analogues was prepared fromdiazoalkanes obtained by this procedure.
3-Substituted 2-nitrosoimino-2,3-dihydrobenzothiazoles (1) were reduced with lithium aluminum hydride to give the corresponding thiazolone azines and bis[o-(N-substituted N-formylamino)phenyl] disulfides as major products. Reactions of 1 with some substituted diazomethanes gave the corresponding unsymmetrical azine N-monoxides (16) or azines (17) depending on the structure of the diazomethane.