The 2-(allyloxy) phenyl acetyl ester as a new relay protecting group for oligosaccharide synthesis
作者:Esther Arranz、Geert-Jan Boons
DOI:10.1016/s0040-4039(01)01303-x
日期:2001.9
The 2-(allyloxy) phenyl acetyl group can be removed by a relay approach using Pd(PPh3)4 in combination with proton sponge, conditions that do not affect acetyl, benzoyl and levulinoyl esters. On the other hand, the acetyl and levulinoyl ester could be cleaved without removal of the 2-(allyloxy) phenyl acetyl group. The new protecting group is compatible with glycosylations and can perform efficiently
可以通过中继方法使用Pd(PPh 3)4与质子海绵结合除去2-(烯丙氧基)苯基乙酰基,该条件不影响乙酰基,苯甲酰基和乙酰丙酸酯。另一方面,可以在不除去2-(烯丙氧基)苯基乙酰基的情况下裂解乙酰基和乙酰丙酸酯。新的保护基团与糖基化相容,并且可以有效地进行邻近基团的参与,导致1,2-反式糖苷的排他性形成。