The reactivity of BiV reagents towards very hindered phenols with tert.-butyl groups at 2 and 6 under basic conditions has been studied. Unexpected phenylation at the 4-position and, in several cases, replacement of a tert.-butyl group by phenyl have been observed. The mechanism of these reactions has been discussed.
Palladium(0)-Catalyzed Intermolecular Arylative Dearomatization of β-Naphthols
作者:Ren-Qi Xu、Ping Yang、Hang-Fei Tu、Shou-Guo Wang、Shu-Li You
DOI:10.1002/anie.201608724
日期:2016.11.21
The first Pd0‐catalyzed intermolecular arylative dearomatization of β‐naphthols with aryl halides is described. It was found that Q‐Phos could facilitate the palladium‐catalyzed cross‐coupling‐type dearomatization of β‐naphthols, while avoiding O‐arylation, to construct 2‐naphthalenones in excellent yields and with high chemoselectivity.
Visible-light-induced cross-coupling of aryl iodides with hydrazones <i>via</i> an EDA-complex
作者:Pan Pan、Shihan Liu、Yu Lan、Huiying Zeng、Chao-Jun Li
DOI:10.1039/d2sc01909d
日期:——
photosensitizer-free cross-coupling of aryl iodides with hydrazones was developed. In this strategy, hydrazones were used as alternatives to organometallic reagents, in the absence of a transition metal or an external photosensitizer, making this cross-coupling mild and green. The protocol was compatible with a variety of functionalities, including methyl, methoxy, trifluoromethyl, halogen, and heteroaromatic