SiPh2CMe3) was achieved via a Mannich reaction between a corresponding phenol II and a chiral oxazinone III as a key step. The utility of such an approach is illustrated by a concise synthesis of a highly oxygenated tetrahydroisoquinoline IV (R = CH2Ph), a key structural unit of ecteinascidin 743 (Et 743) and related natural products. [on SciFinder (R)]
作为关键步骤,通过相应的
苯酚 II 和手性恶嗪酮 III 之间的曼尼希反应,实现了高度官能化、正交保护的
氨基三醇 I(R = CH2Ph,R1 = SiPh2CMe3)的简明合成。高度氧化的
四氢异喹啉 IV (R = CH2Ph) 的简明合成说明了这种方法的实用性,它是海鞘素 743 (Et 743) 和相关
天然产物的关键结构单元。[关于 SciFinder (R)]