convenient and high yielding approach for the deprotection and scavenging of the p-methoxybenzyl (PMB) group in PMB ethers and PMB esters was developed using POCl3 as the reagent. 4-Methoxybenzyl chloride, a starting material used for the preparation of PMB ethers and esters was regenerated in the deprotection step. This mild and selective procedure tolerates several acid sensitive functional groups.
Side-bridged cyclam transition metal complexes bearing a phenolic ether or a phenolate pendent arm
作者:Ryan E. Mewis、Stephen J. Archibald
DOI:10.1016/j.poly.2019.08.003
日期:2019.10
corresponding Cu(II) complex. UV–Vis data for [Ni(L1)]2+ suggests that the Ni(II) ion may be 4 or 6 coordinate whereas the Cu(II) ion in [Cu(L1)]2+ is five coordinate. The Ni(II) ion in the crystal structure of [Ni(L2)][(ClO4)2] possesses a distorted square-planar geometry in which the phenolic ether pendent arm is not involved in the coordination sphere. The cyclam ligand in this complex adopts a trans-II