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483-10-3

Articles about 483-10-3Total 4 be found

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Total Syntheses of Yohimbe Alkaloids, with Stereoselection for the Normal, Allo, and 3-Epiallo Series, Based on Annelations of 4-Methoxy-1,2-dihydropyridones
N--2,3-dihydro-4-pyridone (31) was generated in two steps (77percent yield) from tryptamine and N-methyl-4-piperidone methiodide.Its cyclization (90percent yield) and oxidation (91percent yield) provided the tetracyclic analogue 32.O-Methylation and Robinson-type annelation of these vinylogous lactams (the latter in form of its Na-carbamate) furnished the dienones 38 (64percent) and 43 (90percent).Further elaboration by cyclization and/or reduction reactions selectively provided the 15,16-didehydroyohimbinones 7 and 44.Their reductions then led to yohimbinone (52, 20percent overall yield from tryptamine), alloyohimbinone (11, 19percent overall yield), and 3-epi-alloyohimbinone (10, 23percent overall yield), which led to yohimbine (3), β-yohimbine (9), 3-epi-alloyohimbine (53), and 3-epi-17-epi-alloyohimbine (54).
Kuehne, Martin E.,Muth, Randy S.
p. 2701 - 2712
(2007/10/02)

Novel total syntheses of (±)-yohimbine and (±)-alloyohimbine
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Miyata,Hirata,Naito,Ninomiya
p. 1231 - 1232
(2007/10/02)

Total synthesis of yohimbine.
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van Tamelen,Shamma,Burgstahler,Wolinsky,Tamm,Aldrich
p. 7315 - 7333
(2007/10/04)

Synthesis of (+)-yohimbine and (+)-beta-yohimbine. A new route to yohimban ring system.
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Szantay,Toeke,Honti
p. 1665 - 1670
(2007/10/04)

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Chemical Properties

Melting Point: 225-230°C
Boiling Point: 543°Cat760mmHg
Flash Point:282.2°C
Density: 1.31g/cm³
Storage Temp.:2-8°C
Vapor Pressure: 1.27E-12mmHg at 25°C
PSA: 65.56000
LogP: 2.58500

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