It has been shown that some chalcones are able to inhibit tubulin polymerization, giving cytotoxicity and destruction
of tumoral vasculature. A library of 180 novel chalcone analogs has been synthesized via click chemistry and
screened for their cytotoxicity and tubulin assembly inhibition. 10 out 180 click chalcones displayed low micromolar cytotoxicity
but only compound Nf depicted antitubulin activity. While Nf displayed only micromolar potency this result
shows click-chalcones may be anti-tubulin agents and validate this strategy to search for novel active chemical entities.
A novel gold-catalyzed ethynylation of aromatic rings with electron-deficient alkynes via gold catalyzed C-H activation of both C(sp)-H and C(sp(2))-H bonds has been developed. This transformation provides aromatic propiolates difficult to prepare by other methods, highlighting the synthetic potential of gold chemistry.
Electrochemically Mediated Oxidation of Sensitive Propargylic Benzylic Alcohols
作者:Chad E. Hatch、Maxwell I. Martin、Philip H. Gilmartin、Lu Xiong、Danielle J. Beam、Glenn P. A. Yap、Matthew J. Von Bargen、Joel Rosenthal、William J. Chain
DOI:10.1021/acs.orglett.1c03860
日期:2022.2.25
The electrochemicaloxidation of sensitive propargylic benzylic alcohols having varying substituents is reported. We describe the preparation and characterization of N-hydroxytetrafluorophthalimide (TFNHPI) and pseudo-high-throughput development of a green electrochemicaloxidation protocol for sensitive propargylic benzylic alcohols that employs TFNHPI as a stable electrochemical mediator. The electrochemical
Application of a CC Bond-Forming Conjugate Addition Reaction in Asymmetric Dearomatization of β-Naphthols
作者:Dongxu Yang、Linqing Wang、Ming Kai、Dan Li、Xiaojun Yao、Rui Wang
DOI:10.1002/anie.201503056
日期:2015.8.10
conjugate reaction was successfully applied to the enantioselectivedearomatization of β‐naphthols. A C(sp2)C(sp3) bond is formed by using propargylic ketones as reactive partners. Good to excellent Z/E ratios and ee values were obtained by employing an in situgeneratedmagnesiumcatalyst. Further transformations of the Z‐configured CC double bond in the products were achieved under mild reaction conditions
AC C键形成共轭反应成功地应用于β萘酚的对映选择性脱芳构化。AC(sp2)C(sp3)键是通过使用炔丙基酮作为反应伙伴而形成的。 通过使用原位生成的镁催化剂获得了良好的Z / E 比和ee值。在温和的反应条件下,产物中Z构型的CC双键进一步转化。此外,通过计算化学探索了这种镁催化的脱芳香化反应的立体控制元素。
TfOH-promoted synthesis of indoles and benzofurans involving cyclative transposition of vinyl ketone
作者:Mou Mandal、Rengarajan Balamurugan
DOI:10.1039/d2cc03730k
日期:——
derived from o-alkynylanilines involving a cyclization, retro-aza-Michael reaction and amine trapping cascade is reported here. This atom-economical transformation has been extended to synthesize benzofuran derivatives using analogous vinylogous esters derived from o-alkynylphenols. The excellent stereochemical outcome of the double bond geometry in the products makes it attractive.