Results 151 to 160 of about 10,932 (221)

The synthesis and photochromism of a 2,2-diaryl-6-styryl-2H-[1]benzopyran: Unexpected palladium-mediated ring-contraction of a 6-bromo-2,2-diaryl-2H-[1]benzopyran [PDF]

open access: yesDyes and Pigments, 2012
The ligand-free Pd-mediated reaction between styrene and a 6-bromo-2,2-diaryl-2H-[1]benzopyran proceeded anomalously to give a 2-(diarylmethyl)-5-styrylbenzofuran via a tandem Heck coupling – ring-contraction process; none of the styryl substituted 2,2 ...
Christopher Gabbutt   +2 more
exaly   +2 more sources

Recent Advances in Organocatalyzed Asymmetric Synthesis of Benzopyran and Benzodihydropyran (Chromane) Nuclei [PDF]

open access: yesSymmetry, 2019
Benzopyran and benzodihydropyran (chromane) nuclei are the core structure of many natural products, in particular flavonoids. Many compounds possessing this structure are nutraceuticals, pharmaceutical nutrients.
Raffaella Mancuso, Renato Dalpozzo
exaly   +2 more sources

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