Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Pirjo Hanhinen"'
Publikováno v:
Tetrahedron Letters. 38:1455-1458
Direct addition of dimethyl malonate anion to a 1,4-conjugate iminium salt of 3-ethylindolo[2,3- a ]quinolizidine 4a (regenerated from the corresponding α-aminonitrile 4b ) afforded enamine 5. Catalytic hydrogenation of compound 5 led stereoselectiv
Autor:
Mauri Lounasmaa, Pirjo Hanhinen
Publikováno v:
Tetrahedron. 52:15225-15242
Attempts were made to apply the spontaneous “biogenetic-type cyclization” of van Tamelen to the preparation of the sarpagan ring system by utilizing indolo [2,3-a]quinolizidines 10, 11, 12, and 14 . The fact that the spontaneous “biogenetic-typ
Publikováno v:
Tetrahedron. 52:6803-6810
Publikováno v:
Tetrahedron. 51:11891-11900
Preparation and determination of stereochemical properties of epimeric Z-geissoschizine and 19,20-dihydrogeissoschizine acetals arc described. The determination of the stereochemical properties is mainly based on nmr measurements.
Publikováno v:
Tetrahedron. 50:9207-9222
Syntheses are reported for isositsirikine isomers 1 – 6 and (16S*)-and (16R*)-17-deoxy- E -isositsirikines 9 and 10 (Model compounds 1,2 for the “synthetically missing” (16R)- and (16S)- E -isositsirikines 7 and 8 , respectively). Predominant c
Publikováno v:
ChemInform. 25
Publikováno v:
ChemInform. 26
Publikováno v:
ChemInform. 27
A short, stereospecfic total synthesis of indole alkaloid (±)-corynantheidine 1 is described.
Publikováno v:
ChemInform. 27
Publikováno v:
ChemInform. 27