Stereoselective radical addition of tertiary amines to (5R)-5-menthyloxy-2[5H]-furanone: Application to the enantioselective synthesis of (−)-isoretronecanol and (+)-laburnine
作者:Samuel Bertrand、Norbert Hoffmann、Jean-Pierre Pete
DOI:10.1016/s0040-4039(99)00452-9
日期:1999.4
The adducts of a stereoselective radicaladdition of tertiary amines with (5R)-5-menthyloxy-2[5H]-furanone were transformed very efficiently into enantiomerically pure pyrrolizidine and indolizidine alkaloids, through a three steps sequence.
通过三个步骤将叔胺与(5 R)-5-薄荷基氧基-2 [5 H ]-呋喃酮立体选择性自由基加成的加合物非常有效地转化为对映体纯的吡咯并立定和吲哚并立定生物碱。
Efficient radical addition of tertiary amines to electron-deficient alkenes using semiconductors as photochemical sensitisers
作者:Siniša Marinković、Norbert Hoffmann
DOI:10.1039/b104387k
日期:——
Tertiary amines can be added to electron-deficient alkenes with yields up to 98% in a radical chain reaction initiated by a photochemical electron transfer using inorganic semiconductors like TiO2 as sensitiser.
The efficiency of the photoinduced radicaladdition of tertiary amines to olefinic double bonds is significantly enhanced and the stereoselectivity is influenced when thiocarbonyl compounds are added to the reaction mixture.
Highly Efficient and Stereoselective Radical Addition of Tertiary Amines to Electron-Deficient Alkenes − Application to the Enantioselective Synthesis of Necine Bases
作者:Samuel Bertrand、Norbert Hoffmann、Jean-Pierre Pete