Tandem Sequence of Phenol Oxidation and Intramolecular Addition as a Method in Building Heterocycles
作者:Maxim O. Ratnikov、Linda E. Farkas、Michael P. Doyle
DOI:10.1021/jo302002j
日期:2012.11.16
A tandem phenol oxidation–Michael addition furnishing oxo- and -aza-heterocycles has been developed. Dirhodium caprolactamate [Rh2(cap)4] catalyzed oxidation by T-HYDRO of phenols with alcohols, ketones, amides, carboxylic acids, and N-Boc protected amines tethered to their 4-position afforded 4-(tert-butylperoxy)cyclohexa-2,5-dienones that undergo Brønsted acid catalyzedintramolecular Michael addition
A mild and efficient synthesis of bicyclic oxazolidinonesfrom quinols and isocyanates, under DBU-mediated conditions at room temperature, is described. The aza-Michael addition to substituted cyclohexadienones is stereoselective and chemoselective.
Isolation of cornoside from Olea europaea and its transformation into halleridone
作者:Armandodoriano Bianco、Roberto Lo Scalzo、Maria Luisa Scarpati
DOI:10.1016/s0031-9422(00)95015-5
日期:1993.1
Abstract Olea europaea contains, besides oleuropein, demethyloleuropein, verbascoside and ligstroside, cornoside which can be easily transformed into halleridone.
摘要 油橄榄中除橄榄苦苷、去甲基橄榄苦苷、毛蕊花苷和木耳苷外,还含有角苷,易于转化为哈利酮。
Total synthesis of incargranine A
作者:Patrick D. Brown、Andrew L. Lawrence
DOI:10.1039/c8ob00702k
日期:——
Synthetic studies into the origins of the alkaloid incargranine A have resulted in the development of a four-step (longest linear sequence) total synthesis.
Desymmetrization of Cyclohexadienones via Brønsted Acid-Catalyzed Enantioselective Oxo-Michael Reaction
作者:Qing Gu、Zi-Qiang Rong、Chao Zheng、Shu-Li You
DOI:10.1021/ja100207s
日期:2010.3.31
Desymmetrization of cyclohexadienones via enantioselective oxo-Michael reaction catalyzed by chiral phosphoric acid to afford highly enantioenriched 1,4-dioxane and tetrahydrofuran derivatives in excellent yields has been realized. The newly established methodology allows the facile enantioselective synthesis of cleroindicins C, D, and F.