Synthesis of novel chiral macrocyclic ligands bearing methyl 4,6-O-benzylidene-α-<scp>D</scp>-mannopyranoside
作者:Marek Pietraszkiewicz、Janusz Jurcz ak
DOI:10.1039/c39830000132
日期:——
O-Alkylation of methyl 4,6-O-benzylidene-α-D-mannopyranoside with t-butyl bromoacetate under phase-transfer conditions, followed by reduction and tosylation leads to an intermediate which was used in the formation of the two diaza-crown ethers (3a) and (3b)via condensation with 1,8-diamino-3,6-dioxaoctane in the presence of KF–Al2O3 and N,N-bisethoxycarbonyl-1,8-diamino-3,6-dioxaoctane in Me2SO–NaH–KBr
ø甲基-4,6-的烷基化ø -亚苄基- α- d -mannopyranoside用叔丁基相转移条件下溴,接着通过还原和甲苯磺酰化导致的中间将其在两个二氮杂冠醚的形成中使用醚(3a)和(3b)通过在KF–Al 2 O 3和N,N - N-双乙氧基羰基-1,8-二氨基-3,6-二氧杂辛烷的存在下与1,8-二氨基-3,6-二氧杂辛烷缩合而制得分别在Me 2 SO–NaH–KBr中。