Du, Xin; Zhao, Huan; Li, Xinling; Zhang, Lizhi; Dong, Yunhui; Wang, Ping; Zhang, Daopeng; Liu, Qing; Liu, Hui published an article in 2021. The article was titled 《Ligand-Regulated Palladium-Catalyzed Regiodivergent Hydroarylation of the Distal Double Bond of Allenamides with Aryl Boronic Acid》, and you may find the article in Journal of Organic Chemistry.Related Products of 89466-08-0 The information in the text is summarized as follows:
The ligand-regulated regiodivergent hydroarylation of the distal double bond of allenamides with aryl boronic acid was achieved in the presence of Pd(II) catalysts, delivering a variety of functionalized enamide with excellent E selectivity and Markovnikov/anti-Markovnikov selectivity. Two possible coordination intermediates probably are responsible for the regiodivergent hydroarylation: (1) The coordination Intermediate I, which probably is formed through the coordination of MeCN, distal double bond, Ph to Pd, led to the aryl group away from the Intermediate I, inducing excellent E selectivity and anti-Markovnikov selectivity. (2) A switch of regioselectivity to 1,2-Markovnikov hydroarylation was obtained using bidentate phosphine ligand (dppf or Xantphos). The formed coordination Intermediate II led to the N-tether away from the Intermediate II and at the trans position of aryl, resulting in excellent E selectivity and Markovnikov selectivity. Meanwhile, tentative study on the mechanism proved that the hydron source of this hydroarylation is more likely to be boronic acid. The transmetalation between aryl boronic acid and Pd catalyst was the initial step of this transformation. The experimental process involved the reaction of 2-Hydroxyphenylboronic acid(cas: 89466-08-0Related Products of 89466-08-0)
2-Hydroxyphenylboronic acid(cas: 89466-08-0) belongs to acyl phenylboronic acid. Phenylboronic acid (PBA) has been used to extract β-blockers (a class of aminoalcohol-containing drugs) from aqueous solution, rat, and human plasma. Related Products of 89466-08-0
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