[EN] 6-HETEROARYLOXY BENZIMIDAZOLES AND AZABENZIMIDAZOLES AS JAK2 INHIBITORS [FR] 6-HÉTÉROARYLOXY BENZIMIDAZOLES ET AZABENZIMIDAZOLES EN TANT QU'INHIBITEURS DE JAK2
TETRAHYDROFURANS: I. 2,2-DIMETHYL-4-SUBSTITUTED-4-HYDROXYMETHYLTETRAHYDROFURANS AND RELATED COMPOUNDS
作者:B. K. Wasson、C. H. Gleason、I. Levi、J. M. Parker、L. M. Thompson、C. H. Yates
DOI:10.1139/v61-113
日期:1961.4.1
xymethyltetrahydrofuran (IVe) with acetic anhydride – pyridine hydrochloride yielded 2-allyl-2-methallyl-1,3-propanediol diacetate (Xe). Catalytic reduction of IVe gave 2,2-dimethyl-4-n-propyl-4-hydroxymethyltetrahydrofuran (IVd). Reductive cleavage of the tosylate VIIIb of 2,2,4-trimethyl-4-hydroxymethyltetrahydrofuran (IVb) with lithiumaluminumhydride yielded the known 2,2,4,4-tetramethyltetrahydrofuran
Palladium-catalyzed heteroallylation of unactivated alkenes – synthesis of citalopram
作者:Joanne F. M. Hewitt、Lewis Williams、Pooja Aggarwal、Craig D. Smith、David J. France
DOI:10.1039/c3sc51222c
日期:——
A palladium-catalyzed difunctionalization of unactivated alkenes with tethered nucleophiles is reported. The versatile reaction occurs with simple allylic halides and can be carried out under air. The methodology provides rapid access to a wide array of desirable heterocyclic targets, as illustrated by a concise synthesis of the widely prescribed antidepressantcitalopram.
bond of aliphatic alkenes using tert-butyl nitrite and molecular oxygen to give gamma-lactols has been developed. The present reaction proceeds through a sequence of radical processes involving oxynitration followed by aerobic oxidation of an sp(3) C-H bond. This multifunctionalization reaction requires neither metallic reagents nor photolysis and proceeds under mild conditions.
Palladium-catalyzed allylic substitution on solid support
作者:Lutz F. Tietze、Thomas Hippe、Adrian Steinmetz
DOI:10.1039/a707670c
日期:——
Different polymer-bound 1,3-dicarbonyl compounds react as nucleophiles in Pd-catalyzed allylic substitutions on solid support with a variety of allylic acetates, chlorides and carbonates.
general, and functional group tolerant intramolecular hydroalkoxylation and hydroacyloxylation of unactivated olefins using a Co(salen) complex, an N-fluoropyridinium salt, and a disiloxane reagent is described. This reaction was carried out at room temperature and afforded five- and six-membered oxygen heterocyclic compounds, such as cyclic ethers and lactones. The Co complex was optimized for previously
描述了使用 Co(salen) 配合物、N-氟吡啶鎓盐和二硅氧烷试剂对未活化烯烃进行温和、通用和官能团耐受的分子内加氢烷氧基化和加氢酰氧基化。该反应在室温下进行,得到五元和六元氧杂环化合物,如环醚和内酯。通过未活化烯烃的加氢官能化,Co 配合物针对先前稀有介质环的形成进行了优化。强大的 Co 催化剂体系还可以使 O-保护的链烯醇脱保护加氢烷氧基化和链烯基酯加氢酰氧基化,直接得到环醚和内酯。研究了脱保护的底物范围和机理证明。