An efficient protocol for silver-catalyzed direct radical phosphonation of β-aryl-α,β-unsaturated carbonylcompounds with H-phosphites to afford trans-substituted alkenylphosphonates under microwave irradiation is described. Some notable features of this method are high efficiency, good yield, broad functional groups tolerance, commercially available and cheap catalyst.
Dinuclear Zinc-Catalyzed Asymmetric Tandem Reaction of α-Hydroxy-1-indanone: Access to Spiro[1-indanone-5,2′-γ-butyrolactones]
作者:Meng-Meng Liu、Xiao-Chao Yang、Yuan-Zhao Hua、Jun-Biao Chang、Min-Can Wang
DOI:10.1021/acs.orglett.9b02658
日期:2019.9.6
A highly efficient method for the enantioselective build of spiro[1-indanone-5,2'-γ-butyrolactones] has been developed through the tandem Michael/transesterificationreaction of α-hydroxy-1-indanone and α,β-unsaturated esters. A broad range of spiro(1-indanone-butyrolacones) with contiguous stereocenters have been synthesized with excellent stereoselectivities (up to >20:1 dr, up to >99% ee) under