A simple and practical approach has been developed for conducting direct, homoallylic alcohol forming allylation reactions of nitroalkenes in water. Employing the new method, various arylmethyl-homoallylic alcohols can be produced from the corresponding, readily prepared beta-nitrostyrenes.
Tin Mediated Allylation Reactions of Enol Ethers in Water
Under tin-mediated Barbier-type reaction conditions, hydration of enol ethers takes place to form aldehydes that undergo allylation reactions. By using this process, various homoallylic alcohols and 2-halohomoallylic alcohols are produced in good to excellent yields.
Enantiomerically Enriched α-Borylzinc Reagents by Nickel-Catalyzed Carbozincation of Vinylboronic Esters
作者:Chenlong Zhang、Weipeng Hu、Gabriel J. Lovinger、Jing Jin、Jingjia Chen、James P. Morken
DOI:10.1021/jacs.1c05274
日期:2021.9.8
In this paper is described a synthesis of enantiomerically enriched, configurationally stable organozinc reagents by catalyticenantioselective carbozincation of a vinylboronic ester. This process furnishes enantiomerically enriched α-borylzinc intermediates that are shown to undergo stereospecific reactions, producing enantioenriched secondary boronic ester products. The properties of the intermediate
Synthesis of the Tetracyclic Core (ABCE Rings) of Daphenylline
作者:Bowen Fang、Huaiji Zheng、Changgui Zhao、Peng Jing、Huilin Li、Xingang Xie、Xuegong She
DOI:10.1021/jo301533f
日期:2012.9.21
A concise synthesis of the tetracyclic core (ABCE rings) of daphenylline has been accomplished involving a benzobicyclo[3.3.1] lactam as the key intermediate. This bridged bicyclic intermediate was efficiently constructed via a Brønstedacid promoted intramolecular Friedel–Crafts type Michaeladdition of a δ-benzyl α,β-unsaturated δ-lactam.