Palladium-Catalyzed Cross-Coupling of Cyanohydrins with Aryl Bromides: Construction of Biaryl Ketones
作者:Huifang Dai、P. Andrew Evans、Jadab Majhi、Bohang Zhou、Yuxin Zhuang、Mai-Jan Tom
DOI:10.1055/a-1850-3687
日期:——
The palladium-catalyzedcross-coupling of the lithium anion of aryl tert-butyldimethylsilyl-protected cyanohydrins with arylbromides followed by in situ deprotection with fluoride ion provides a convenient and versatile approach to biaryl ketones. This protocol represents the first example of a palladium-catalyzed arylation of a cyanohydrin, which functions as an acyl anion equivalent. Hence, in contrast
Selective non-nucleoside HIV-1 reverse transcriptase inhibitors. New 2,3-dihydrothiazolo[2,3-a]isoindol-5(9bH)-ones and related compounds with anti-HIV-1 activity
A series of substituted 2,3-dihydrothiazolo[2,3-a]isoindol-5(9bH)-ones and related compounds 1-73 were synthesized and evaluated for their ability to inhibit reverse transcriptase (RT) of the human immune deficiency virus 1 (HIV-1) and replication of HIV-1 in MT2 cells. The antiviral activity of these compounds depends on the stereoselective configuration of the substituent in position 9b. Structure-activity
Catalytic asymmetric addition to cyclic <i>N</i>-acyl-iminium: access to sulfone-bearing contiguous quaternary stereocenters
作者:Viraj A. Bhosale、Ivana Císařová、Martin Kamlar、Jan Veselý
DOI:10.1039/d2cc02667h
日期:——
Herein, we report the first chiral phosphoric acid (CPA)-catalyzed asymmetric addition of α-fluoro(phenylsulfonyl)methane (FSM) derivatives to in situ generated cyclic N-acyliminium. This process enables metal-free expeditious access to sulfone and fluorine incorporating contiguous all substituted quaternarystereocenters ingrained in biorelevant isoindolinones in excellent stereoselectivities (up
在这里,我们报告了第一个手性磷酸(CPA)催化的α-氟(苯磺酰基)甲烷(FSM)衍生物与原位生成的环状N-酰基亚胺的不对称加成。该工艺能够以优异的立体选择性(高达 99% ee 和高达 50:1 dr),快速获得无金属的砜和氟,并结合在生物相关异吲哚啉酮中根深蒂固的连续所有取代的四元立体中心。