The constitution, configuration and conformation of three N-hydroxydiphenylpiperidines were established by 'H and 13C 2D NMR spectroscopy. The products were obtained using phase-transfer conditions.
Reaction of dibenzalcyclohexanone with hydroxylamine hydrochloride. 2D NMR elucidation of the structure of the products
✍ Scribed by Eduardo Dlaz; Héctor Barrios; Benjamin Ortiz; Rubén Sánchez-Obregón; Francisco Yuste; W. F. Reynolds; Jose Luis Aguilera; Efrén Caballero
- Publisher
- John Wiley and Sons
- Year
- 1989
- Tongue
- English
- Weight
- 370 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0749-1581
No coin nor oath required. For personal study only.
✦ Synopsis
The reaction of dibenzalcyclohexanone with hydroxylamine hydrochloride affords three compounds: the oxime of 2-benzylidenecyclohexanone (Z), 3-phenyl-7-benzylidene-3,3a,4,5,6,7-hexahydr~2,l-ben~soxazole (3) and 3-phenyl-3,3a,4,5,6,7-hexahydro-2,l-ben~soxazol~7~pir~~~~-phenylaziridine) (4). Their structures were deduced by 2D NMR analysis. Single-crystal x-ray diffraction was used to confirm the structure and stereochemistry of 4. A possible mechanism for this reaction is proposed.
📜 SIMILAR VOLUMES
## Abstract This paper considers the strategy of the StrucEluc expert system application for structure elucidation of new natural products when there is a lack of connectivity information that is characteristic of proton‐deficient molecules. It is shown that in this case, a database search for frag
## Abstract The reaction of 3‐(3‐aryl‐3‐oxopropenyl)chromen‐4‐ones with 1,2‐phenylenediamine resulted in the unexpected formation of 10a‐aryl‐1,2,10,10a‐tetrahydrobenzo‐[4,5]‐imidazo[1,2‐a]pyridin‐3‐yl(2‐hydroxyphenyl)‐1‐methanones. Their structure elucidation and complete ^1^H and ^13^C assignment
Photooxygenation of 1,2-dihydronaphthalenes resulted in diendoperoxides and hydroperoxides via [ 4 + 2 ] cycloaddition and ene reactions, respectively. The relative conÐguration and stereochemistry of the products were elucidated by various 1H and 13C NMR methods.
## Abstract Numerous indoloquinoline alkaloid structures have been identified from extracts of the West African plant __Cryptolepis sanguinolenta__. Recently, through the use of 2D NMR methods and cryogenic NMR probe technology in conjunction with computer‐assisted structure elucidation (CASE) meth