Silver-Catalyzed Vinylogous Fluorination of Vinyl Diazoacetates
摘要:
A silver-catalyzed vinylogous fluorination of vinyl diazoacetates to generate gamma-fluoro-alpha,beta-unsaturated carbonyls is presented. Application of this method to the fluorination of farnesol and steroid derivatives was achieved.
Synthesis of Allylboranes via Cu(I)-Catalyzed B–H Insertion of Vinyldiazoacetates into Phosphine–Borane Adducts
作者:Denis Drikermann、Robert S. Mößel、Walid K. Al-Jammal、Ivan Vilotijevic
DOI:10.1021/acs.orglett.9b04619
日期:2020.2.7
Cu(I) catalysts enable C-B bond formation via direct insertion of vinyldiazoacetates into B-H bonds of borane-phosphine Lewis adducts to form phosphine-protected allylboranes under mild conditions. The resulting allylborane-phosphine Lewis adducts can be used in the diastereoselective allylation of aldehydes directly without the need for removal of the phosphine. The allylation reaction proceeds with
Gold‐Catalyzed Formal [4+1]/[4+3] Cycloadditions of Diazo Esters with Triazines
作者:Chenghao Zhu、Guangyang Xu、Jiangtao Sun
DOI:10.1002/anie.201606139
日期:2016.9.19
gold‐catalyzed formal [4+1]/[4+3] cycloadditions of diazo esters with hexahydro‐1,3,4‐triazines, thus providing five‐ and seven‐membered heterocycles in moderate to high yields under mild reaction conditions. These reactions feature the use of a gold complex to accomplish the diverse annulations and the first example of the involvement of a gold metallo‐enolcarbene in a cycloaddition. It is also the