can be introduced efficiently without the need for any acid or base catalysis and which is not prone to acid or base catalysed migration is a significant advantage for many syntheses. Benzhydryl [diphenylmethyl] ethers of sugar lactones are formed in high yield under neutral conditions when the corresponding alcohol is heated with diphenyldiazomethane in an inert solvent such as acetonitrile or toluene;
对于许多合成而言,可在不需要任何酸或碱催化的情况下有效地引入保护基且不易于被酸或碱催化的迁移的保护基是重要的优点。当相应的醇与
二苯基重氮甲烷在惰性溶剂(如
乙腈或
甲苯)中加热时,在中性条件下,糖内酯的苄基[二苯基甲基]醚可以高收率形成;这样就可以在没有任何其他试剂的情况下轻松保护对碱敏感的和高度受阻的叔醇。