Výsledky vyhledávání - "Ujjal K. Banerjee"

Photolysis of α-diazocyclopentanones. Ring contraction to functionalised cyclobutanes and synthesis of junionone, grandisol and planococcyl acetate

Autor: Arun Ghosh, Ujjal K. Banerjee, R. V. Venkateswaran

Publikováno v: Tetrahedron. 46:3077-3088

Photolysis of diazoketone 19 in methanol furnished the cyclobutane carboxylate 20. Photolysis in aqueous sodium bicarbonate-THF afforded the acid 21 in better yield. Reduction of the ester followed by oxidation and a subsequent Wittig reaction furnis

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::6f4cb001ba485a94111d2c7023d2493b
https://doi.org/10.1016/s0040-4020(01)88398-8

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Reaction of 2,2-disubstituted cyclopentanones with bromine an alkali : facile preparation of 5,5-disubstituted 2-hydroxycyclopentenones and transformation to the 3,3-disubstituted cyclopentanones

Autor: Ujjal K. Banerjee, Ramanathapuram V. Venkateswaran

Publikováno v: Tetrahedron Letters. 24:4625-4626

Reaction of 2,2-disubstitutted cyclopentanones ( 1a–d ) with bromine followed by aqueous alkali furnishes the 5,5-disubstituted 2-hydroxycyclopent-2-en-1-ones which were transformed to the 3,3-disubstituted cyclopentanones by reduction with hydriod

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::381b8f0af849b090c064fa5870cef105
https://doi.org/10.1016/s0040-4039(00)85973-0

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