Abstract Catalyzed by samarium triiodide (SmI3), substitution of acyl with N‐acylbenzotriazoles for acetyl in acetoacetic esters and acetylacetone proceeds smoothly under neutral conditions in open air, affording the corresponding β‐keto esters and β‐diketones in good yields.
Synthesis and spectral studies of (1,3-diketonato)triphenylantimony(V) complexes
作者:V.K. Jain、R. Bohra、R.C. Mehrotra
DOI:10.1016/s0022-328x(00)94363-8
日期:1980.1
Ph3SbBr2 reacts with Na[RCOCHCOR′] to form compounds of the type Ph3SbBr(RCOCHCOR′) (where R = R′ = CH3, C(CH3)3 and R ɳ R′ = CH3, C6H5; CH3, 4′-MeC6H4; CH3, 4′-MeOC6H4; CH3, 4′-ClC6H4; CH3, 4′BrC6H4 and CF3, 2-C4H3S). Reactions of Ph3Sb(OMe)2 with RCOCH2COR′ yield Ph3Sb(OMe) (RCOCHCOR′). From molecular weight, IR and NMR data, it is concluded that 1,3-diketone ligand moiety behaves as a bidentate
facile and efficient one-step procedures for the regioselectivesynthesis of 7-aryl-5-methyl- and 5-aryl-7-methyl-2-amino-[1,2,4]triazolo[1,5-a]pyrimidines have been developed, via reactions of 3,5-diamino-1,2,4-triazole with variously substituted 1-aryl-1,3-butanediones and 1-aryl-2-buten-1-ones, respectively. The excellent yield and/or regioselectivity shown by the reactions decreased when ethyl 5-amino-1