Design and synthesis of active heparan sulfate-based probes
作者:Wen Zhou、Po-Hung Hsieh、Yongmei Xu、Timothy R. O’Leary、Xuefei Huang、Jian Liu
DOI:10.1039/c5cc02008e
日期:——
Synthesis of sulfated carbohydrate molecular probes and the utilities as specific inhibitors for carbohydrate sulfotransferases.
硫酸化碳水化合物分子探针的合成及其作为碳水化合物磺基转移酶的特异性抑制剂的效用。
Rhodium(II)-Catalyzed Decomposition of β,γ-Unsaturated Diazo Compounds
作者:Shahrokh Motallebi、Paul Müller
DOI:10.1002/hlca.19930760806
日期:1993.12.15
The RhII-catalyzed decomposition of β,γ-unsaturated diazo ketones 1 in the presence of MeOH leads via vinylogous Wolff rearrangement to γ,δ-unsaturated esters 6 (Schemes 1 and 2). A modest asymmetric induction is achieved when the reaction is carried out with chiral tetrakis(pyrrolidinecarboxylato)- or tetrakis(oxazolidinonato)dirhodium(II) complexes. Vinyl and phenyl diazoacetates 11 and 20, respectively
Formation of Acyl-Substituted Nitrile Ylides by Rh<sub>2</sub>(OAc)<sub>4</sub>-Catalyzed Decomposition of<i>α</i>-Diazocarbonyl Compounds in Nitriles
作者:Kazuaki Fukushima、Toshikazu Ibata
DOI:10.1246/bcsj.68.3469
日期:1995.12
The Rh2(OAc)4-catalyzed reactions of α-diazocarbonyl compounds in nitrile in the presence of dimethyl acetylenedicarboxylate (DMAD) gave oxazole and pyrrole derivatives. The formation of the oxazole derivatives is explained in terms of the 1,5-cyclization of an acyl-substituted nitrileylide intermediate, and the formation of the pyrrole derivatives is explained by the 1,3-dipolar cycloaddition of
Photochemical interconversion of some diazo-amides and diazirinecarboxamides
作者:R. A. Franich、G. Lowe、J. Parker
DOI:10.1039/p19720002034
日期:——
photoisomerisation of diazo-compounds by visible light to give diazirines appears to be restricted to α-diazo-amides. Mono- and di-substituted, alkyl- and aryl-diazirinecarboxamides as well as the parent diazirinecarboxamide have been made in this way. The photoisomerisation of the diazirinecarboxamides back to diazo-amides can be effected by irradiation at the frequency of the diazirine absorption band
Synthesis of 2-Cycloalkenones (Parts of 1,4-Diacyl-1,3-butadiene Systems) and of a Heterocyclic Analogue by Metal-Catalyzed Decomposition of 2-Diazoacylfurans
and diazoketo functions leads to the formation of a hydroindenone and pyrrolone, respectively. Replacement of the diazomethylketo terminus by an α-diazoethylketo system or a α-diazo-β-keto-ester function produces 2-substituted 2-cycloalkenones. A furan with a C4, diazo-methylketo-terminating side-chain at C(3) is described to be transformed into a 4-formylmethylidene-2-cyclohe-xenone.