Shorter Synthesis of Trifunctionalized Cryptophane-A Derivatives
作者:Olena Taratula、P. Aru Hill、Yubin Bai、Najat S. Khan、Ivan J. Dmochowski
DOI:10.1021/ol200088f
日期:2011.3.18
cryptophane-A derivatives that are versatile host molecules for many applications are reported. Trihydroxy cryptophane was synthesized in six or seven steps with yields as high as 9.5%. By a different route, trihydroxy cryptophane modified with three propargyl, allyl, or benzyl protecting groups was synthesized with yields of 4.1−5.8% in just six steps. Hyperpolarized 129Xe NMR chemicalshifts of 57−65