作者:M.Teresa Herrero、Imanol Tellitu、Esther Domı́nguez、Isabel Moreno、Raúl SanMartı́n
DOI:10.1016/s0040-4039(02)02019-1
日期:2002.11
A novel access to 1,4-benzodiazepin-2-ones starting from glycine and alanine derivatives is described. The key cyclization step was performed by the action of phenyliodine(III)bis(trifluoroacetate) (PIFA) on the corresponding methoxyamide derivatives leading to the C(9a)N(1) bond construction. This strategy avoids the necessity of additional functionalization on the phenyl ring and facilitates the
描述了一种从甘氨酸和丙氨酸衍生物开始的新的获得1,4-苯并二氮杂-2-酮的方法。关键环化步骤是通过苯基碘(III)双(三氟乙酸盐)(PIFA)对相应的甲氧基酰胺衍生物进行的,从而导致C(9a)N(1)键的构建而进行的。该策略避免了在苯环上进行额外官能化的必要性,并有助于获得许多1,4-苯并二氮杂卓衍生物。另外,从光学纯的(S)-丙氨酸酯开始,在环化步骤中未观察到外消旋化。