Stereoselective Synthesis of Polyhydroxycycloheptanes and Their Phosphate Derivatives from 8-Oxabicyclo[3.2.1]octenes
作者:Dmitry A. Khlevin、Sergey E. Sosonyuk、Marina V. Proskurnina、Nikolay S. Zefirov
DOI:10.1002/ejoc.201201426
日期:2013.4
The first directed synthesis of seven-membered mono- and tris-phosphates is described. The key steps involve a DIBAL-H/DIBAL-Cl-mediated ring opening of 8-oxabicyclo[3.2.1]octenes in the presence of [Ni(acac)2] and stereoselective syn-dihydroxylation with NMO and OsO4. An enantioselective approach to ring opening has been examined with chiral phosphane. The phosphorylation of mono- and triols followed