Synthesis and characterization of a new chiral pentacyclic phosphine
A new helically chiral pentacyclic phosphine, containing one thiophene ring, was prepared in good yield and purity via a five-step sequence involving a Wittig reaction, a palladium-catalyzed Mizoroki-Heck coupling, and classical oxidative photocyclization reactions. The investigation using ultraviolet-visible spectroscopy shows that the helicene precursor of the target helical phosphine as well as its phosphine oxide have interesting behaviors.
Moussa, Souad,Aloui, Faouzi,Hassine, Bechir Ben
p. 268 - 276
(2013/01/15)
Substituent dependent photochemical rearrangements of halostyrylheterocycles in acid media
New photorearrangement product 2 and hydrolysis product 3 are obtained by irradiating acidic halostyrylheterocycles 1a-f. The competing formal [1,3]hydrogen shift and ring opening of dihydrophenanthrene intermediate is responsible for the product formatio
Ho, Jinn-Hsuan,Ho, Tong-Ing
p. 4669 - 4672
(2007/10/03)
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