A study of the C3/C7 stereochemistry of uncarines C,D,E and F by circular dichroism
β Scribed by A.F. Beecham; N.K. Hart; S.R. Johns; J.A. Lamberton
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- French
- Weight
- 106 KB
- Volume
- 8
- Category
- Article
- ISSN
- 0040-4039
No coin nor oath required. For personal study only.
β¦ Synopsis
Uncarines C, D, E and F, the four 19a-methyl, 15,20 tie oxindoles epimeric at C3 and C7 and related to tetrahydroalstonine have been shown to have structures I-IV
(1,2) . For
π SIMILAR VOLUMES
The overall photobromination reactions Brz + RFI -+ IBr + RFBr have been studied using a competitive technique. obtained for the rate-determining step (16) Relative Arrhenius parameters were Br + RFI -+ IBr + R F These were placed on an absolute basis using previous absolute values of A and E for Th
The reaction of 2,6-diarylidenecyclohexanones with hydrazine hydrate in glacial acetic acid resulted in the formation of diastereomers of (E)-2-acetyl-3-aryl-7-arylidene-3,3a,4,5,6,7-hexahydroindazoles. The relative conΓgurations of these diastereomers were unambiguously assigned using 1H and 13C NM