## Abstract The rates of photo‐oxidation of exocyclic __S‐cis__‐butadienes grafted onto bicyclo‐[2.2.1]heptanes and 7‐oxabicyclo[2.2.1]heptanes (**1–6**) are dependent upon remote modifications of the bicyclic skeletons. They correlate with the rates of __Diels‐Alder__ additions of these dienes to
Conformational Analysis of Endoperoxides Grafted onto Bicyclo[2.2.n]alkanes as a Test of the Rigidity of the Bicyclic Skeleton. Photo-oxidation of [2.2.2] Hericene and 2,3,5,6-Tetramethylidenebicyclo[2.2.n]alkanes
✍ Scribed by Jean-Luc Birbaum; Pierre Vogel
- Publisher
- John Wiley and Sons
- Year
- 1986
- Tongue
- German
- Weight
- 733 KB
- Volume
- 69
- Category
- Article
- ISSN
- 0018-019X
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✦ Synopsis
Introduction. ~ According to Houk and coworkers [ 1 b], the pyrdmidalization of the double bond in bicyclo[2.2.l]hept-2-ene (1) and synsesquinorbornene 2 [2] is due to torsional interactions between the alkene and the allylic substituents. This can be visualized by using the model of 'banana' bonding orbitals for the 0 and z electrons of the C=C 4-. H 1 ') 2,
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## Abstract Triphenylphosphine (TPP) has been utilized as a novel and efficient catalyst for the Knoevenagel condensation of indole‐3‐carboxaldehydes **1(a–e)**, 1‐methyl‐1H‐indole‐3‐carboxaldehydes **4(a–e)**, and 1‐ethyl‐1H‐indole‐3‐carboxaldehydes **6(a–e)** with the active methylene compound, t