Selective activation of propargyl 1,2-orthoesters in the presence of propargyl glycosides and propargyl ethers was studied; a catalytic amount of AuBr3 activated the propargyloxy group of the 1,2-orthoester thereby giving access to disaccharides with the propargyl group at the reducing end; furthermore, propargyl ethers were unaffected under the reaction conditions.
在存在炔丙基糖苷和
炔丙基醚的情况下,对炔丙基1,2-邻酯的选择性活化进行了研究;少量
AuBr3催化剂可活化1,2-邻酯的炔丙氧基团,从而获得在还原端具有炔丙基团的
双糖;此外,在反应条件下
炔丙基醚不受影响。