Divergent synthesis of flavones and flavanones from 2′-hydroxydihydrochalcones <i>via</i> palladium(<scp>ii</scp>)-catalyzed oxidative cyclization
作者:Seung Hwan Son、Yang Yil Cho、Hyung-Seok Yoo、Soo Jin Lee、Young Min Kim、Hyu Jeong Jang、Dong Hwan Kim、Jeong-Won Shin、Nam-Jung Kim
DOI:10.1039/d1ra01672e
日期:——
Divergent and versatile synthetic routes to flavones and flavanones via efficient Pd(II) catalysis are disclosed. These Pd(II) catalyses expediently provide a variety of flavones and flavanones from 2′-hydroxydihydrochalcones as common intermediates, depending on oxidants and additives, via discriminate oxidative cyclization sequences involving dehydrogenation, respectively, in a highly atom-economic
公开了通过有效的 Pd( II ) 催化合成黄酮和黄烷酮的不同且通用的合成路线。根据氧化剂和添加剂,这些 Pd( II ) 催化剂分别以高度原子经济的方式通过涉及脱氢的区分氧化环化序列,方便地从 2'-羟基二氢查耳酮中提供各种黄酮和黄烷酮作为常见的中间体。
Convenient synthesis of flavanone derivatives via oxa-Michael addition using catalytic amount of aqueous cesium fluoride
flavanones, which included polycyclic aromatic and heterocyclic rings, were readily synthesized via oxa-Michael addition from the corresponding hydroxychalcones with a catalytic amount of aqueous cesium fluoride solution under mild conditions. This method could be applied to the scalable synthesis of eriodictyol as a known potent inhibitor of the SARS-CoV-2 spike protein.
Catalytic enantioselective synthesis of flavanones and chromanones
申请人:Scheidt Karl
公开号:US20090259055A1
公开(公告)日:2009-10-15
Various chromanone, flavanone and abyssinone compounds as can be prepared enantioselectively using a chiral thiourea catalyst.
可以使用手性硫脲催化剂对各种色酮、黄酮和阿比西农化合物进行对映选择性合成。
Palladium-Catalyzed [3+3] Annulation of Vinyl Chromium(0) Carbene Complexes through Carbene Migratory Insertion/Tsuji-Trost Reaction
作者:Kang Wang、Yifan Ping、Taiwei Chang、Jianbo Wang
DOI:10.1002/anie.201707590
日期:2017.10.9
Vinyl chromium(0) Fischer carbenecomplexes were employed as the source of π‐allylic palladium species for catalytic [3+3] annulation under palladium catalysis. Mechanistically, this transformation is proposed to involve carbene migratory insertion and intramolecular Tsuji–Trost reaction as the key steps. Substituted six‐membered heterocyclic flavonones and quinolines are obtained, depending on the
Highly Selective Palladium-Catalyzed Direct CH α-Monoarylation of Carbonyl Compounds using Water Containing the Surfactant Polyoxyethylene-α-Tocopheryl Sebacate (PTS) as a Solvent
Highly selective direct CH α-monoarylation reactions of 4-chromanones, ketones and 2-phenylacetaldehyde with aryl halides have been performed in satisfactory yields by using a tris(dibenzylideneacetone)dipalladium(0)/tri-tert-butylphosphine tetrafluoroborate catalyst system, potassium bicarbonate as the base and a solvent consisting of pure water containing a small amount of polyoxyethylene-α-tocopheryl