Synthesis of α,β-Unsaturated α′-Haloketones through the Chemoselective Addition of Halomethyllithiums to Weinreb Amides
作者:Vittorio Pace、Laura Castoldi、Wolfgang Holzer
DOI:10.1021/jo401236t
日期:2013.8.2
A straightforward synthesis of variously functionalized α,β-unsaturated α′-haloketones has been achieved through the chemoselective addition of halomethyllithium carbenoids to Weinrebamides at −78 °C. A comparative study employing the corresponding esters under the same reaction conditions pointed out that the instability of the tetrahedral intermediate formed from the latter is responsible for the
Five‐Step Enantioselective Synthesis of Islatravir via Asymmetric Ketone Alkynylation and an Ozonolysis Cascade
作者:Niki R. Patel、Mark A. Huffman、Xiao Wang、Bangwei Ding、Mark McLaughlin、Justin A. Newman、Teresa Andreani、Kevin M. Maloney、Heather C. Johnson、Aaron M. Whittaker
DOI:10.1002/chem.202003091
日期:2020.11.6
enantioselective synthesis of the potent anti‐HIV nucleoside islatravir is reported. The highly efficient route was enabled by a novel enantioselective alkynylation of an α,β‐unsaturated ketone, a unique ozonolysis‐dealkylation cascade in water, and an enzymatic aldol‐glycosylation cascade.