Reaction of Pentaeyclo[5.4.0.02,6.03'10.05'9] undecmle-8,l l-dione (l) with ethanedithiol, when performed in the presence of a Lewis acid catalyst (F3B-OEt2), afforded the corresponding mono(ethylene dithioacetal), 2, along with 7,8-[(thicethano)thio]pentacyclo[6.3.0.02,6.03, lO.05,9]undecan-l 1-on
Peptide analogs containing the pentacyclo[5,4,0,02,6,03,6,05,9]undecane scaffold: conformational analysis in solution
โ Scribed by Mariane Axt; Hassan Oulyadi; Xavier Pannecoucke; Jean-Charles Quirion; Adriana R. Pohlmann; Valentim E.U. Costa
- Publisher
- Elsevier Science
- Year
- 2004
- Tongue
- English
- Weight
- 306 KB
- Volume
- 689
- Category
- Article
- ISSN
- 0022-2860
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Photoelectron spectra of six 8,11-disubstituted pentacycloundecanes (1, 3 -7) are reported; the results suggest that the through-space interaction betweeen unsaturation centers in 1 and 3 dominates over the through-bond interaction mechanism.
## Abstract The production of compounds derived from intramolecular photocycloaddition reactions upon DielsโAlder adducts has received considerable attention, but assignment of the NMR spectra of the photoaddition products has proved problematic, rendering structural determination difficult. This p
The standard molar energy of combustion of pentacyclo[5.4.0.0 2,6 .0 3,10 .0 5,9 ]undecane-8,11-dione has been determined by using a static bomb calorimeter. The vapour pressure of the compound was measured in the interval T = 325.64 K to T = 340.97 K by the Knudsen-effusion technique. Enthalpy of f