Addressing the Configuration Stability of Lithiated Secondary Benzylic Carbamates for the Development of a Noncryogenic Stereospecific Boronate Rearrangement
作者:Keith R. Fandrick、Nitinchandra D. Patel、Jason A. Mulder、Joe Gao、Michael Konrad、Elizabeth Archer、Frederic G. Buono、Adil Duran、Rolf Schmid、Juergen Daeubler、Daniel R. Fandrick、Shengli Ma、Nelu Grinberg、Heewon Lee、Carl A. Busacca、Jinhua J. Song、Nathan K. Yee、Chris H. Senanayake
DOI:10.1021/ol502060c
日期:2014.9.5
A practical noncryogenic process for the Aggarwal stereospecific boronate rearrangement with chiral secondary benzylic carbamates has been developed. The use of LDA instead of sec-BuLi combined with an in situ trapping of the unstable lithiated carbamate was critical to success. Furthermore, this new process increased the substrate scope to include the versatile aryl iodide and bromide substrates.